How to encrypt String using Camellia 128-bit Encryption Algorithm in Java?

Im currently trying to develop a chat application that implement Camellia 128-bit as its encryption algorithm. I succesfully build and run the code from it official page [here][1]. The problem is the algorithm encrypt for Integer datatype. When im trying to encrypt String message, i converted it into ASCII form, but it gives me

Exception in thread "main" java.lang.NumberFormatException: For input string: "10410110810811132119111114108100" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.lang.Integer.parseInt(Integer.java:583) at java.lang.Integer.parseInt(Integer.java:615) at Camellia.main(Camellia.java:54)

. I know that it happens because the ASCII code is too long. But im really stuck, and clueless how can i use the algorithm for String encryption. Below is my main code

 int[] key = {987777, 1, 2, 3}; // 128 bit key example
 int[] keyTable = new int[52];
 Camellia n=new Camellia();
 n.Camellia_Ekeygen(key, keyTable);

 String c = "";
 String str = "hello world";
 System.out.println(str);
 BigInteger bigInt;
 byte[] bytes;
     try{
        bytes = str.getBytes("US-ASCII");

        for(int i=0; i<str.length(); i++){
            System.out.print(bytes[i]+",");
            c += String.valueOf(bytes[i]);
        }
        System.out.println("");
        bigInt = new BigInteger(c);
        System.out.println(bigInt);
 }catch(Exception e){};

 int C = Integer.parseInt(c);

 int[] plaintext = {C, 5, 6, 7}; // 128 bit plaintext block example
 int[] ciphertext = new int[4];
 n.Camellia_EncryptBlock(plaintext, keyTable, ciphertext);
 n.Camellia_DecryptBlock(ciphertext, keyTable, plaintext);

and here is my full code:-

import java.math.BigInteger;
public class Camellia{
 public static void main(String[] args) {

    int[] key = {987777, 1, 2, 3}; // 128 bit key example
    int[] keyTable = new int[52];
 Camellia n=new Camellia();
 n.Camellia_Ekeygen(key, keyTable);

 String c = "";
 String str = "hello world";
 System.out.println(str);
 BigInteger bigInt;
 byte[] bytes;
     try{
        bytes = str.getBytes("US-ASCII");

        for(int i=0; i<str.length(); i++){
            System.out.print(bytes[i]+",");
            c += String.valueOf(bytes[i]);
        }
        System.out.println("");
        bigInt = new BigInteger(c);
        System.out.println(bigInt);
 }catch(Exception e){};

 int C = Integer.parseInt(c);

 int[] plaintext = {C, 5, 6, 7}; // 128 bit plaintext block example
 int[] ciphertext = new int[4];
 n.Camellia_EncryptBlock(plaintext, keyTable, ciphertext);
 n.Camellia_DecryptBlock(ciphertext, keyTable, plaintext);
 }

    /*
 *-------------------------------------------------------------------------------------------------
 * S-box data
 *-------------------------------------------------------------------------------------------------
 */
 private final int SBOX1_1110[] =
  {
    0x70707000, 0x82828200, 0x2c2c2c00, 0xececec00, 0xb3b3b300, 0x27272700,
    0xc0c0c000, 0xe5e5e500, 0xe4e4e400, 0x85858500, 0x57575700, 0x35353500,
    0xeaeaea00, 0x0c0c0c00, 0xaeaeae00, 0x41414100, 0x23232300, 0xefefef00,
    0x6b6b6b00, 0x93939300, 0x45454500, 0x19191900, 0xa5a5a500, 0x21212100,
    0xededed00, 0x0e0e0e00, 0x4f4f4f00, 0x4e4e4e00, 0x1d1d1d00, 0x65656500,
    0x92929200, 0xbdbdbd00, 0x86868600, 0xb8b8b800, 0xafafaf00, 0x8f8f8f00,
    0x7c7c7c00, 0xebebeb00, 0x1f1f1f00, 0xcecece00, 0x3e3e3e00, 0x30303000,
    0xdcdcdc00, 0x5f5f5f00, 0x5e5e5e00, 0xc5c5c500, 0x0b0b0b00, 0x1a1a1a00,
    0xa6a6a600, 0xe1e1e100, 0x39393900, 0xcacaca00, 0xd5d5d500, 0x47474700,
    0x5d5d5d00, 0x3d3d3d00, 0xd9d9d900, 0x01010100, 0x5a5a5a00, 0xd6d6d600,
    0x51515100, 0x56565600, 0x6c6c6c00, 0x4d4d4d00, 0x8b8b8b00, 0x0d0d0d00,
    0x9a9a9a00, 0x66666600, 0xfbfbfb00, 0xcccccc00, 0xb0b0b000, 0x2d2d2d00,
    0x74747400, 0x12121200, 0x2b2b2b00, 0x20202000, 0xf0f0f000, 0xb1b1b100,
    0x84848400, 0x99999900, 0xdfdfdf00, 0x4c4c4c00, 0xcbcbcb00, 0xc2c2c200,
    0x34343400, 0x7e7e7e00, 0x76767600, 0x05050500, 0x6d6d6d00, 0xb7b7b700,
    0xa9a9a900, 0x31313100, 0xd1d1d100, 0x17171700, 0x04040400, 0xd7d7d700,
    0x14141400, 0x58585800, 0x3a3a3a00, 0x61616100, 0xdedede00, 0x1b1b1b00,
    0x11111100, 0x1c1c1c00, 0x32323200, 0x0f0f0f00, 0x9c9c9c00, 0x16161600,
    0x53535300, 0x18181800, 0xf2f2f200, 0x22222200, 0xfefefe00, 0x44444400,
    0xcfcfcf00, 0xb2b2b200, 0xc3c3c300, 0xb5b5b500, 0x7a7a7a00, 0x91919100,
    0x24242400, 0x08080800, 0xe8e8e800, 0xa8a8a800, 0x60606000, 0xfcfcfc00,
    0x69696900, 0x50505000, 0xaaaaaa00, 0xd0d0d000, 0xa0a0a000, 0x7d7d7d00,
    0xa1a1a100, 0x89898900, 0x62626200, 0x97979700, 0x54545400, 0x5b5b5b00,
    0x1e1e1e00, 0x95959500, 0xe0e0e000, 0xffffff00, 0x64646400, 0xd2d2d200,
    0x10101000, 0xc4c4c400, 0x00000000, 0x48484800, 0xa3a3a300, 0xf7f7f700,
    0x75757500, 0xdbdbdb00, 0x8a8a8a00, 0x03030300, 0xe6e6e600, 0xdadada00,
    0x09090900, 0x3f3f3f00, 0xdddddd00, 0x94949400, 0x87878700, 0x5c5c5c00,
    0x83838300, 0x02020200, 0xcdcdcd00, 0x4a4a4a00, 0x90909000, 0x33333300,
    0x73737300, 0x67676700, 0xf6f6f600, 0xf3f3f300, 0x9d9d9d00, 0x7f7f7f00,
    0xbfbfbf00, 0xe2e2e200, 0x52525200, 0x9b9b9b00, 0xd8d8d800, 0x26262600,
    0xc8c8c800, 0x37373700, 0xc6c6c600, 0x3b3b3b00, 0x81818100, 0x96969600,
    0x6f6f6f00, 0x4b4b4b00, 0x13131300, 0xbebebe00, 0x63636300, 0x2e2e2e00,
    0xe9e9e900, 0x79797900, 0xa7a7a700, 0x8c8c8c00, 0x9f9f9f00, 0x6e6e6e00,
    0xbcbcbc00, 0x8e8e8e00, 0x29292900, 0xf5f5f500, 0xf9f9f900, 0xb6b6b600,
    0x2f2f2f00, 0xfdfdfd00, 0xb4b4b400, 0x59595900, 0x78787800, 0x98989800,
    0x06060600, 0x6a6a6a00, 0xe7e7e700, 0x46464600, 0x71717100, 0xbababa00,
    0xd4d4d400, 0x25252500, 0xababab00, 0x42424200, 0x88888800, 0xa2a2a200,
    0x8d8d8d00, 0xfafafa00, 0x72727200, 0x07070700, 0xb9b9b900, 0x55555500,
    0xf8f8f800, 0xeeeeee00, 0xacacac00, 0x0a0a0a00, 0x36363600, 0x49494900,
    0x2a2a2a00, 0x68686800, 0x3c3c3c00, 0x38383800, 0xf1f1f100, 0xa4a4a400,
    0x40404000, 0x28282800, 0xd3d3d300, 0x7b7b7b00, 0xbbbbbb00, 0xc9c9c900,
    0x43434300, 0xc1c1c100, 0x15151500, 0xe3e3e300, 0xadadad00, 0xf4f4f400,
    0x77777700, 0xc7c7c700, 0x80808000, 0x9e9e9e00
  };

  private int SBOX4_4404[] =
  {
    0x70700070, 0x2c2c002c, 0xb3b300b3, 0xc0c000c0, 0xe4e400e4, 0x57570057,
    0xeaea00ea, 0xaeae00ae, 0x23230023, 0x6b6b006b, 0x45450045, 0xa5a500a5,
    0xeded00ed, 0x4f4f004f, 0x1d1d001d, 0x92920092, 0x86860086, 0xafaf00af,
    0x7c7c007c, 0x1f1f001f, 0x3e3e003e, 0xdcdc00dc, 0x5e5e005e, 0x0b0b000b,
    0xa6a600a6, 0x39390039, 0xd5d500d5, 0x5d5d005d, 0xd9d900d9, 0x5a5a005a,
    0x51510051, 0x6c6c006c, 0x8b8b008b, 0x9a9a009a, 0xfbfb00fb, 0xb0b000b0,
    0x74740074, 0x2b2b002b, 0xf0f000f0, 0x84840084, 0xdfdf00df, 0xcbcb00cb,
    0x34340034, 0x76760076, 0x6d6d006d, 0xa9a900a9, 0xd1d100d1, 0x04040004,
    0x14140014, 0x3a3a003a, 0xdede00de, 0x11110011, 0x32320032, 0x9c9c009c,
    0x53530053, 0xf2f200f2, 0xfefe00fe, 0xcfcf00cf, 0xc3c300c3, 0x7a7a007a,
    0x24240024, 0xe8e800e8, 0x60600060, 0x69690069, 0xaaaa00aa, 0xa0a000a0,
    0xa1a100a1, 0x62620062, 0x54540054, 0x1e1e001e, 0xe0e000e0, 0x64640064,
    0x10100010, 0x00000000, 0xa3a300a3, 0x75750075, 0x8a8a008a, 0xe6e600e6,
    0x09090009, 0xdddd00dd, 0x87870087, 0x83830083, 0xcdcd00cd, 0x90900090,
    0x73730073, 0xf6f600f6, 0x9d9d009d, 0xbfbf00bf, 0x52520052, 0xd8d800d8,
    0xc8c800c8, 0xc6c600c6, 0x81810081, 0x6f6f006f, 0x13130013, 0x63630063,
    0xe9e900e9, 0xa7a700a7, 0x9f9f009f, 0xbcbc00bc, 0x29290029, 0xf9f900f9,
    0x2f2f002f, 0xb4b400b4, 0x78780078, 0x06060006, 0xe7e700e7, 0x71710071,
    0xd4d400d4, 0xabab00ab, 0x88880088, 0x8d8d008d, 0x72720072, 0xb9b900b9,
    0xf8f800f8, 0xacac00ac, 0x36360036, 0x2a2a002a, 0x3c3c003c, 0xf1f100f1,
    0x40400040, 0xd3d300d3, 0xbbbb00bb, 0x43430043, 0x15150015, 0xadad00ad,
    0x77770077, 0x80800080, 0x82820082, 0xecec00ec, 0x27270027, 0xe5e500e5,
    0x85850085, 0x35350035, 0x0c0c000c, 0x41410041, 0xefef00ef, 0x93930093,
    0x19190019, 0x21210021, 0x0e0e000e, 0x4e4e004e, 0x65650065, 0xbdbd00bd,
    0xb8b800b8, 0x8f8f008f, 0xebeb00eb, 0xcece00ce, 0x30300030, 0x5f5f005f,
    0xc5c500c5, 0x1a1a001a, 0xe1e100e1, 0xcaca00ca, 0x47470047, 0x3d3d003d,
    0x01010001, 0xd6d600d6, 0x56560056, 0x4d4d004d, 0x0d0d000d, 0x66660066,
    0xcccc00cc, 0x2d2d002d, 0x12120012, 0x20200020, 0xb1b100b1, 0x99990099,
    0x4c4c004c, 0xc2c200c2, 0x7e7e007e, 0x05050005, 0xb7b700b7, 0x31310031,
    0x17170017, 0xd7d700d7, 0x58580058, 0x61610061, 0x1b1b001b, 0x1c1c001c,
    0x0f0f000f, 0x16160016, 0x18180018, 0x22220022, 0x44440044, 0xb2b200b2,
    0xb5b500b5, 0x91910091, 0x08080008, 0xa8a800a8, 0xfcfc00fc, 0x50500050,
    0xd0d000d0, 0x7d7d007d, 0x89890089, 0x97970097, 0x5b5b005b, 0x95950095,
    0xffff00ff, 0xd2d200d2, 0xc4c400c4, 0x48480048, 0xf7f700f7, 0xdbdb00db,
    0x03030003, 0xdada00da, 0x3f3f003f, 0x94940094, 0x5c5c005c, 0x02020002,
    0x4a4a004a, 0x33330033, 0x67670067, 0xf3f300f3, 0x7f7f007f, 0xe2e200e2,
    0x9b9b009b, 0x26260026, 0x37370037, 0x3b3b003b, 0x96960096, 0x4b4b004b,
    0xbebe00be, 0x2e2e002e, 0x79790079, 0x8c8c008c, 0x6e6e006e, 0x8e8e008e,
    0xf5f500f5, 0xb6b600b6, 0xfdfd00fd, 0x59590059, 0x98980098, 0x6a6a006a,
    0x46460046, 0xbaba00ba, 0x25250025, 0x42420042, 0xa2a200a2, 0xfafa00fa,
    0x07070007, 0x55550055, 0xeeee00ee, 0x0a0a000a, 0x49490049, 0x68680068,
    0x38380038, 0xa4a400a4, 0x28280028, 0x7b7b007b, 0xc9c900c9, 0xc1c100c1,
    0xe3e300e3, 0xf4f400f4, 0xc7c700c7, 0x9e9e009e
  };

  private final int SBOX2_0222[] =
  {
    0x00e0e0e0, 0x00050505, 0x00585858, 0x00d9d9d9, 0x00676767, 0x004e4e4e,
    0x00818181, 0x00cbcbcb, 0x00c9c9c9, 0x000b0b0b, 0x00aeaeae, 0x006a6a6a,
    0x00d5d5d5, 0x00181818, 0x005d5d5d, 0x00828282, 0x00464646, 0x00dfdfdf,
    0x00d6d6d6, 0x00272727, 0x008a8a8a, 0x00323232, 0x004b4b4b, 0x00424242,
    0x00dbdbdb, 0x001c1c1c, 0x009e9e9e, 0x009c9c9c, 0x003a3a3a, 0x00cacaca,
    0x00252525, 0x007b7b7b, 0x000d0d0d, 0x00717171, 0x005f5f5f, 0x001f1f1f,
    0x00f8f8f8, 0x00d7d7d7, 0x003e3e3e, 0x009d9d9d, 0x007c7c7c, 0x00606060,
    0x00b9b9b9, 0x00bebebe, 0x00bcbcbc, 0x008b8b8b, 0x00161616, 0x00343434,
    0x004d4d4d, 0x00c3c3c3, 0x00727272, 0x00959595, 0x00ababab, 0x008e8e8e,
    0x00bababa, 0x007a7a7a, 0x00b3b3b3, 0x00020202, 0x00b4b4b4, 0x00adadad,
    0x00a2a2a2, 0x00acacac, 0x00d8d8d8, 0x009a9a9a, 0x00171717, 0x001a1a1a,
    0x00353535, 0x00cccccc, 0x00f7f7f7, 0x00999999, 0x00616161, 0x005a5a5a,
    0x00e8e8e8, 0x00242424, 0x00565656, 0x00404040, 0x00e1e1e1, 0x00636363,
    0x00090909, 0x00333333, 0x00bfbfbf, 0x00989898, 0x00979797, 0x00858585,
    0x00686868, 0x00fcfcfc, 0x00ececec, 0x000a0a0a, 0x00dadada, 0x006f6f6f,
    0x00535353, 0x00626262, 0x00a3a3a3, 0x002e2e2e, 0x00080808, 0x00afafaf,
    0x00282828, 0x00b0b0b0, 0x00747474, 0x00c2c2c2, 0x00bdbdbd, 0x00363636,
    0x00222222, 0x00383838, 0x00646464, 0x001e1e1e, 0x00393939, 0x002c2c2c,
    0x00a6a6a6, 0x00303030, 0x00e5e5e5, 0x00444444, 0x00fdfdfd, 0x00888888,
    0x009f9f9f, 0x00656565, 0x00878787, 0x006b6b6b, 0x00f4f4f4, 0x00232323,
    0x00484848, 0x00101010, 0x00d1d1d1, 0x00515151, 0x00c0c0c0, 0x00f9f9f9,
    0x00d2d2d2, 0x00a0a0a0, 0x00555555, 0x00a1a1a1, 0x00414141, 0x00fafafa,
    0x00434343, 0x00131313, 0x00c4c4c4, 0x002f2f2f, 0x00a8a8a8, 0x00b6b6b6,
    0x003c3c3c, 0x002b2b2b, 0x00c1c1c1, 0x00ffffff, 0x00c8c8c8, 0x00a5a5a5,
    0x00202020, 0x00898989, 0x00000000, 0x00909090, 0x00474747, 0x00efefef,
    0x00eaeaea, 0x00b7b7b7, 0x00151515, 0x00060606, 0x00cdcdcd, 0x00b5b5b5,
    0x00121212, 0x007e7e7e, 0x00bbbbbb, 0x00292929, 0x000f0f0f, 0x00b8b8b8,
    0x00070707, 0x00040404, 0x009b9b9b, 0x00949494, 0x00212121, 0x00666666,
    0x00e6e6e6, 0x00cecece, 0x00ededed, 0x00e7e7e7, 0x003b3b3b, 0x00fefefe,
    0x007f7f7f, 0x00c5c5c5, 0x00a4a4a4, 0x00373737, 0x00b1b1b1, 0x004c4c4c,
    0x00919191, 0x006e6e6e, 0x008d8d8d, 0x00767676, 0x00030303, 0x002d2d2d,
    0x00dedede, 0x00969696, 0x00262626, 0x007d7d7d, 0x00c6c6c6, 0x005c5c5c,
    0x00d3d3d3, 0x00f2f2f2, 0x004f4f4f, 0x00191919, 0x003f3f3f, 0x00dcdcdc,
    0x00797979, 0x001d1d1d, 0x00525252, 0x00ebebeb, 0x00f3f3f3, 0x006d6d6d,
    0x005e5e5e, 0x00fbfbfb, 0x00696969, 0x00b2b2b2, 0x00f0f0f0, 0x00313131,
    0x000c0c0c, 0x00d4d4d4, 0x00cfcfcf, 0x008c8c8c, 0x00e2e2e2, 0x00757575,
    0x00a9a9a9, 0x004a4a4a, 0x00575757, 0x00848484, 0x00111111, 0x00454545,
    0x001b1b1b, 0x00f5f5f5, 0x00e4e4e4, 0x000e0e0e, 0x00737373, 0x00aaaaaa,
    0x00f1f1f1, 0x00dddddd, 0x00595959, 0x00141414, 0x006c6c6c, 0x00929292,
    0x00545454, 0x00d0d0d0, 0x00787878, 0x00707070, 0x00e3e3e3, 0x00494949,
    0x00808080, 0x00505050, 0x00a7a7a7, 0x00f6f6f6, 0x00777777, 0x00939393,
    0x00868686, 0x00838383, 0x002a2a2a, 0x00c7c7c7, 0x005b5b5b, 0x00e9e9e9,
    0x00eeeeee, 0x008f8f8f, 0x00010101, 0x003d3d3d
  };

  private final int SBOX3_3033[] =
  {
    0x38003838, 0x41004141, 0x16001616, 0x76007676, 0xd900d9d9, 0x93009393,
    0x60006060, 0xf200f2f2, 0x72007272, 0xc200c2c2, 0xab00abab, 0x9a009a9a,
    0x75007575, 0x06000606, 0x57005757, 0xa000a0a0, 0x91009191, 0xf700f7f7,
    0xb500b5b5, 0xc900c9c9, 0xa200a2a2, 0x8c008c8c, 0xd200d2d2, 0x90009090,
    0xf600f6f6, 0x07000707, 0xa700a7a7, 0x27002727, 0x8e008e8e, 0xb200b2b2,
    0x49004949, 0xde00dede, 0x43004343, 0x5c005c5c, 0xd700d7d7, 0xc700c7c7,
    0x3e003e3e, 0xf500f5f5, 0x8f008f8f, 0x67006767, 0x1f001f1f, 0x18001818,
    0x6e006e6e, 0xaf00afaf, 0x2f002f2f, 0xe200e2e2, 0x85008585, 0x0d000d0d,
    0x53005353, 0xf000f0f0, 0x9c009c9c, 0x65006565, 0xea00eaea, 0xa300a3a3,
    0xae00aeae, 0x9e009e9e, 0xec00ecec, 0x80008080, 0x2d002d2d, 0x6b006b6b,
    0xa800a8a8, 0x2b002b2b, 0x36003636, 0xa600a6a6, 0xc500c5c5, 0x86008686,
    0x4d004d4d, 0x33003333, 0xfd00fdfd, 0x66006666, 0x58005858, 0x96009696,
    0x3a003a3a, 0x09000909, 0x95009595, 0x10001010, 0x78007878, 0xd800d8d8,
    0x42004242, 0xcc00cccc, 0xef00efef, 0x26002626, 0xe500e5e5, 0x61006161,
    0x1a001a1a, 0x3f003f3f, 0x3b003b3b, 0x82008282, 0xb600b6b6, 0xdb00dbdb,
    0xd400d4d4, 0x98009898, 0xe800e8e8, 0x8b008b8b, 0x02000202, 0xeb00ebeb,
    0x0a000a0a, 0x2c002c2c, 0x1d001d1d, 0xb000b0b0, 0x6f006f6f, 0x8d008d8d,
    0x88008888, 0x0e000e0e, 0x19001919, 0x87008787, 0x4e004e4e, 0x0b000b0b,
    0xa900a9a9, 0x0c000c0c, 0x79007979, 0x11001111, 0x7f007f7f, 0x22002222,
    0xe700e7e7, 0x59005959, 0xe100e1e1, 0xda00dada, 0x3d003d3d, 0xc800c8c8,
    0x12001212, 0x04000404, 0x74007474, 0x54005454, 0x30003030, 0x7e007e7e,
    0xb400b4b4, 0x28002828, 0x55005555, 0x68006868, 0x50005050, 0xbe00bebe,
    0xd000d0d0, 0xc400c4c4, 0x31003131, 0xcb00cbcb, 0x2a002a2a, 0xad00adad,
    0x0f000f0f, 0xca00caca, 0x70007070, 0xff00ffff, 0x32003232, 0x69006969,
    0x08000808, 0x62006262, 0x00000000, 0x24002424, 0xd100d1d1, 0xfb00fbfb,
    0xba00baba, 0xed00eded, 0x45004545, 0x81008181, 0x73007373, 0x6d006d6d,
    0x84008484, 0x9f009f9f, 0xee00eeee, 0x4a004a4a, 0xc300c3c3, 0x2e002e2e,
    0xc100c1c1, 0x01000101, 0xe600e6e6, 0x25002525, 0x48004848, 0x99009999,
    0xb900b9b9, 0xb300b3b3, 0x7b007b7b, 0xf900f9f9, 0xce00cece, 0xbf00bfbf,
    0xdf00dfdf, 0x71007171, 0x29002929, 0xcd00cdcd, 0x6c006c6c, 0x13001313,
    0x64006464, 0x9b009b9b, 0x63006363, 0x9d009d9d, 0xc000c0c0, 0x4b004b4b,
    0xb700b7b7, 0xa500a5a5, 0x89008989, 0x5f005f5f, 0xb100b1b1, 0x17001717,
    0xf400f4f4, 0xbc00bcbc, 0xd300d3d3, 0x46004646, 0xcf00cfcf, 0x37003737,
    0x5e005e5e, 0x47004747, 0x94009494, 0xfa00fafa, 0xfc00fcfc, 0x5b005b5b,
    0x97009797, 0xfe00fefe, 0x5a005a5a, 0xac00acac, 0x3c003c3c, 0x4c004c4c,
    0x03000303, 0x35003535, 0xf300f3f3, 0x23002323, 0xb800b8b8, 0x5d005d5d,
    0x6a006a6a, 0x92009292, 0xd500d5d5, 0x21002121, 0x44004444, 0x51005151,
    0xc600c6c6, 0x7d007d7d, 0x39003939, 0x83008383, 0xdc00dcdc, 0xaa00aaaa,
    0x7c007c7c, 0x77007777, 0x56005656, 0x05000505, 0x1b001b1b, 0xa400a4a4,
    0x15001515, 0x34003434, 0x1e001e1e, 0x1c001c1c, 0xf800f8f8, 0x52005252,
    0x20002020, 0x14001414, 0xe900e9e9, 0xbd00bdbd, 0xdd00dddd, 0xe400e4e4,
    0xa100a1a1, 0xe000e0e0, 0x8a008a8a, 0xf100f1f1, 0xd600d6d6, 0x7a007a7a,
    0xbb00bbbb, 0xe300e3e3, 0x40004040, 0x4f004f4f
  };



 private int ct0,ct1,ct2,ct3;
 private int pt0,pt1,pt2,pt3;

 private int RightRotate(int x, int s){
    return (((x) >>> (s)) + ((x) << (32 - s)));
 };

 private long LeftRotate(int x, int s){
    return ((x) << (s)) + ((x) >>> (32 - s)) ;
 };


 /*
  *-------------------------------------------------------------------------------------------------
  * Computes the exclusive-or of x and y and and assigns it to z, ie,
  *
  * z = x ^ y
  *-------------------------------------------------------------------------------------------------
  */
  private void XorBlock(int[] x , int x_ ,int[] y, int y_, int[] z, int z_){
     z[0 + z_] = x[0 + x_] ^ y[0 + y_];
     z[1 + z_] = x[1 + x_] ^ y[1 + y_];
     z[2 + z_] = x[2 + x_] ^ y[2 + y_];
     z[3 + z_] = x[3 + x_] ^ y[3 + y_];
  };
  /*
   *-------------------------------------------------------------------------------------------------
   * This function is only used in key generation.
   *-------------------------------------------------------------------------------------------------
   */

   private static void RotBlock
   (
      int x[], int x_,
      int n,
      int y[], int y_
   )
   {
      int r = (n & 31);   /* Must not be 0 */
      int idx = (n >>> 5);
      int idx1 = (idx + 1) & 3;
      int idx2 = (idx1 + 1) & 3;

      y[0 + y_] = (x[idx + x_] << r) | (x[idx1 + x_] >>> (32 - r));
      y[1 + y_] = (x[idx1 + x_] << r) | (x[idx2 + x_] >>> (32 - r));
  }




  /* Key generation constants */

  private final int SIGMA1[] = {
  0xa09e667f, 0x3bcc908b,
  0xb67ae858, 0x4caa73b2};
  private final int SIGMA2[] = {
  0xc6ef372f, 0xe94f82be,
  0x54ff53a5, 0xf1d36f1c};

  /*
   * As for this variable, it is used in 192/256 bit version camellia.
   */
   private final int SIGMA3[] = {
   0x10e527fa, 0xde682d1d,
   0xb05688c2, 0xb3e6c1fd};


  private int KSFT1[] = {
      0, 64, 0, 64, 15, 79, 15, 79, 30, 94, 45, 109, 45, 124, 60, 124, 77, 13,
      94, 30, 94, 30, 111, 47, 111, 47
  };

  private int KIDX1[] = {
     0, 0, 8, 8, 0, 0, 8, 8, 8, 8, 0, 0, 8, 0, 8, 8, 0, 0, 0, 0, 8, 8, 0, 0, 8, 8
  };

 /*
  * As for this variable, it is used in 192/256 bit version camellia.
  */
  private int KSFT2[] = {
     0, 64, 0, 64, 15, 79, 15, 79, 30, 94, 30, 94, 45, 109, 45, 109, 60, 124,
     60, 124, 60, 124, 77, 13, 77, 13, 94, 30, 94, 30, 111, 47, 111, 47
  };

 /*
  * As for this variable, it is used in 192/256 bit version camellia.
  */
  private int KIDX2[] = {
     0, 0, 12, 12, 4, 4, 8, 8, 4, 4, 12, 12, 0, 0, 8, 8, 0, 0, 4, 4, 12, 12,
     0, 0, 8, 8, 4, 4, 8, 8, 0, 0, 12, 12
  };

  private void Camellia_Feistel
  (
      int[] x, int x_,
      int[] k, int k_,
      int key_offset
  )
  {
int D, U;
int s1, s2;

s1 = x[0 + x_] ^ k[0 + k_];

U  = SBOX4_4404[s1 & 0x000000FF];
U ^= SBOX3_3033[(s1 >>> 8 ) & 0x000000FF];
U ^= SBOX2_0222[(s1 >>> 16) & 0x000000FF];
U ^= SBOX1_1110[(s1 >>> 24) & 0x000000FF];
s2 = x[1 + x_] ^ k[1 + k_];
D  = SBOX1_1110[s2 & 0x000000FF];
D ^= SBOX4_4404[(s2 >>> 8 ) & 0x000000FF];
D ^= SBOX3_3033[(s2 >>> 16) & 0x000000FF];
D ^= SBOX2_0222[(s2 >>> 24) & 0x000000FF];

x[2 + x_] ^= D ^ U ;
x[3 + x_] ^= D ^ U ^ RightRotate(U, 8);

s1 = x[2 + x_] ^ k[key_offset + k_];
U = SBOX4_4404[s1 & 0x000000FF];
U ^= SBOX3_3033[(s1 >>> 8 ) & 0x000000FF];
U ^= SBOX2_0222[(s1 >>> 16) & 0x000000FF];
U ^= SBOX1_1110[(s1 >>> 24) & 0x000000FF];
s2 = x[3 + x_] ^ k[key_offset+1 + k_];
D = SBOX1_1110[s2 & 0x000000FF];
D ^= SBOX4_4404[(s2 >>> 8 ) & 0x000000FF];
D ^= SBOX3_3033[(s2 >>> 16) & 0x000000FF];
D ^= SBOX2_0222[(s2 >>> 24) & 0x000000FF];

x[0 + x_] ^= D ^ U  ;
x[1 + x_] ^= D ^ U ^ RightRotate(U, 8) ;

}

 /*
  * Optimized F Function
  */
  private void Camellia_Feistel_Enc
  (
     int[] k, int k_
  )
  {
     int D, U;
     int s1, s2;

     s1 = ct0 ^ k[0 + k_];

     U  = SBOX4_4404[s1 & 0x000000FF];
     U ^= SBOX3_3033[(s1 >>> 8 ) & 0x000000FF];
     U ^= SBOX2_0222[(s1 >>> 16) & 0x000000FF];
     U ^= SBOX1_1110[(s1 >>> 24) & 0x000000FF];
     s2 = ct1  ^ k[1 + k_];
     D  = SBOX1_1110[s2 & 0x000000FF];
     D ^= SBOX4_4404[(s2 >>> 8 ) & 0x000000FF];
     D ^= SBOX3_3033[(s2 >>> 16) & 0x000000FF];
     D ^= SBOX2_0222[(s2 >>> 24) & 0x000000FF];

     ct2 ^= D ^ U ;
     ct3 ^= D ^ U ^ RightRotate(U, 8);

     s1 = ct2  ^ k[2 + k_];
     U = SBOX4_4404[s1 & 0x000000FF];
     U ^= SBOX3_3033[(s1 >>> 8 ) & 0x000000FF];
     U ^= SBOX2_0222[(s1 >>> 16) & 0x000000FF];
     U ^= SBOX1_1110[(s1 >>> 24) & 0x000000FF];
     s2 = ct3 ^ k[3 + k_];
     D = SBOX1_1110[s2 & 0x000000FF];
     D ^= SBOX4_4404[(s2 >>> 8 ) & 0x000000FF];
     D ^= SBOX3_3033[(s2 >>> 16) & 0x000000FF];
     D ^= SBOX2_0222[(s2 >>> 24) & 0x000000FF];

    ct0 ^= D ^ U  ;
    ct1 ^= D ^ U ^ RightRotate(U, 8) ;

  }

  private void Camellia_Feistel_Dec(int[] k, int k_)
 {
    int D, U;
    int s1, s2;

    s1 = pt0 ^ k[0 + k_];

U  = SBOX4_4404[s1 & 0x000000FF];
U ^= SBOX3_3033[(s1 >>> 8 ) & 0x000000FF];
U ^= SBOX2_0222[(s1 >>> 16) & 0x000000FF];
U ^= SBOX1_1110[(s1 >>> 24) & 0x000000FF];
s2 = pt1  ^ k[1 + k_];
D  = SBOX1_1110[s2 & 0x000000FF];
D ^= SBOX4_4404[(s2 >>> 8 ) & 0x000000FF];
D ^= SBOX3_3033[(s2 >>> 16) & 0x000000FF];
D ^= SBOX2_0222[(s2 >>> 24) & 0x000000FF];

pt2 ^= D ^ U ;
pt3 ^= D ^ U ^ RightRotate(U, 8);

s1 = pt2  ^ k[k_ - 2];
U = SBOX4_4404[s1 & 0x000000FF];
U ^= SBOX3_3033[(s1 >>> 8 ) & 0x000000FF];
U ^= SBOX2_0222[(s1 >>> 16) & 0x000000FF];
U ^= SBOX1_1110[(s1 >>> 24) & 0x000000FF];
s2 = pt3 ^ k[k_ - 1];
D = SBOX1_1110[s2 & 0x000000FF];
D ^= SBOX4_4404[(s2 >>> 8 ) & 0x000000FF];
D ^= SBOX3_3033[(s2 >>> 16) & 0x000000FF];
D ^= SBOX2_0222[(s2 >>> 24) & 0x000000FF];

pt0 ^= D ^ U  ;
pt1 ^= D ^ U ^ RightRotate(U, 8) ;
}

public void Camellia_Ekeygen(int[] rawKey,int[] keyTable){
int t[] = new int[16];
int  i;

memcpy(t, 0, rawKey, 0, 4);
 for (i = 4; i < 8; i++) t[i] = 0;


XorBlock(t, 0, t , 4, t, 8);
Camellia_Feistel(t, 8, SIGMA1, 0, 2);
XorBlock(t, 8, t, 0, t, 8);
Camellia_Feistel(t, 8, SIGMA2, 0, 2);
memcpy(keyTable, 0, t, 0, 16);
memcpy(keyTable, 4, t, 8, 8);

    for (i = 4; i < 26; i += 2 ){
        RotBlock(t , KIDX1[i + 0], KSFT1[i + 0], keyTable, i*2);
        RotBlock(t , KIDX1[i + 1], KSFT1[i + 1], keyTable, i*2+2);
    }
 }

public void Camellia_EncryptBlock(int plaintext[],int keyTable[],int ciphertext[]){
   int j;
   int grandRounds;

   int k = 4;

   ct0 = keyTable[0] ^ (plaintext[0]);
   ct1 = keyTable[1] ^ (plaintext[1]);
   ct2 = keyTable[2] ^ (plaintext[2]);
   ct3 = keyTable[3] ^ (plaintext[3]);

   for (grandRounds = 0; grandRounds < 3; grandRounds++)
   {
        for (j = 0; j < 6; j+=2, k += 4)
            Camellia_Feistel_Enc(keyTable,k);

     if (grandRounds < 2)
     {
        ct1 ^= LeftRotate(ct0 & keyTable[k + 0], 1);
        ct0 ^= ct1 | keyTable[k + 1];
        ct2 ^= ct3 | keyTable[k + 3];
        ct3 ^= LeftRotate(ct2 & keyTable[k + 2], 1);
        k += 4;
     }
   }

ciphertext[0] = keyTable[k + 0] ^ (ct2);
ciphertext[1] = keyTable[k + 1] ^ (ct3);
ciphertext[2] = keyTable[k + 2] ^ (ct0);
ciphertext[3] = keyTable[k + 3] ^ (ct1); System.out.println(String.valueOf(ciphertext[0])+","+String.valueOf(ciphertext[1])+","+String.valueOf(ciphertext[2])+","+String.valueOf(ciphertext[3]));

}

public void Camellia_DecryptBlock
(
int ciphertext[],
int keyTable[],
int plaintext[]
)
 {
  int grandRounds;
  int j;
  int k;

k = 48;

pt0 = keyTable[k + 0] ^ (ciphertext[0]);
pt1 = keyTable[k + 1] ^ (ciphertext[1]);
pt2 = keyTable[k + 2] ^ (ciphertext[2]);
pt3 = keyTable[k + 3] ^ (ciphertext[3]);

k -= 2;

for (grandRounds = 0; grandRounds < 3; grandRounds++)
{
    for (j = 0; j < 6; j+=2, k -= 4)
        Camellia_Feistel_Dec(keyTable,k);

    if (grandRounds < 2)
    {
        pt1 ^= LeftRotate(pt0 & keyTable[k + 0], 1);
        pt0 ^= pt1 | keyTable[k + 1];
        pt2 ^= pt3 | keyTable[k - 1];
        pt3 ^= LeftRotate(pt2 & keyTable[k - 2], 1);
        k -= 4;
    }
}

k -= 2;

plaintext[0] = keyTable[k + 0] ^ (pt2);
plaintext[1] = keyTable[k + 1] ^ (pt3);
plaintext[2] = keyTable[k + 2] ^ (pt0);
plaintext[3] = keyTable[k + 3] ^ (pt1);

int C = plaintext[0];
//char c =(char) C;
String c = String.valueOf(C);
asciiToSentence(c,c.length());

System.out.println(c+","+String.valueOf(plaintext[1])+","+String.valueOf(plaintext[2])+","+String.valueOf(plaintext[3]));

   }

 private static final void memcpy(int[] dst , int dst_ ,int[] src, int src_ ,int leng)
 {
    for(int i=0; i < leng ;i++){
        dst[i + dst_]=src[i + src_];
    }
 }

static void asciiToSentence(String str, int len)
{
    String st = "";
    int num = 0;
    for (int i = 0; i < len; i++) {

        // Append the current digit
        num = num * 10 + (str.charAt(i) - '0');

        // If num is within the required range
        if (num >= 32 && num <= 122) {

            // Convert num to char
            char ch = (char)num;
            System.out.println(ch);
            // Reset num to 0
            num = 0;
        }
    }
}


};

  [1]: https://info.isl.ntt.co.jp/crypt/eng/camellia/dl/camellia-java-BSD-1.0.1.tar.gz

As already commented by @Topaco it's a lot of work to check the implementation for an encryption algorithm "just for fun" so below you find a working example of a full encryption/decryption program that uses the Bouncy Castle security provider.

The program is running with an 128 bit = 16 byte long key and uses the CBC-mode - it could be "downgraded" to use the ECB-mode but this is not recommended as the ECB-mode is unsecure and should be no longer used for a new application.

It encrypts a string to a byte array and back to the original string:

Camellia 128 CBC encryption with Bouncy Castle
plaintext: The quick brown fox jumps over the lazy dog
plaintext  length: 43 data: 54686520717569636b2062726f776e20666f78206a756d7073206f76657220746865206c617a7920646f67
ciphertext length: 48 data: 56629f6df124b289c18da9baa80efd3bc12833c69916d2dea1bc58bad250f5a6f78bb440c086308426e1eb10e9d952bc
decry.text length: 43 data: 54686520717569636b2062726f776e20666f78206a756d7073206f76657220746865206c617a7920646f67
decryptedtext: The quick brown fox jumps over the lazy dog

Security warning: the program has no exception handling and is for educational purpose only.

code:

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.*;

public class MainSo {
    public static void main(String[] args) throws NoSuchPaddingException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
        System.out.println("Camellia 128 CBC encryption with Bouncy Castle");

        Security.addProvider(new BouncyCastleProvider());
        String plaintext = "The quick brown fox jumps over the lazy dog";
        byte[] plaintextBytes = plaintext.getBytes(StandardCharsets.UTF_8);

        // generate random key + iv
        SecureRandom secureRandom = new SecureRandom();
        byte[] key = new byte[16]; // 16 bytes = 128 bit key
        secureRandom.nextBytes(key);
        byte[] iv = new byte[16];
        secureRandom.nextBytes(iv);
        // setup cipher
        Cipher cipher = Cipher.getInstance("Camellia/CBC/PKCS7Padding", "BC");
        SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);
        // encryption
        cipher.init(Cipher.ENCRYPT_MODE, keySpec, ivParameterSpec);
        byte[] ciphertext = cipher.doFinal(plaintextBytes);
        System.out.println("plaintext: " + plaintext);
        System.out.println("plaintext  length: " + plaintextBytes.length + " data: " + bytesToHex(plaintextBytes));
        System.out.println("ciphertext length: " + ciphertext.length + " data: " + bytesToHex(ciphertext));
        // decryption
        cipher.init(Cipher.DECRYPT_MODE, keySpec, ivParameterSpec);
        byte[] decryptedtext = cipher.doFinal(ciphertext);
        System.out.println("decry.text length: " + decryptedtext.length + " data: " + bytesToHex(decryptedtext));
        System.out.println("decryptedtext: " + new String(decryptedtext));
    }
    private static String bytesToHex(byte[] bytes) {
        StringBuffer result = new StringBuffer();
        for (byte b : bytes) result.append(Integer.toString((b & 0xff) + 0x100, 16).substring(1));
        return result.toString();
    }
}