Thread: Chinese Remainder therom

 try {
         CH_m = new BigInteger(Chinese_m.getText());
         CH_n = new BigInteger(Chinese_n.getText());
         CH_a = new BigInteger(Chinese_a.getText());
         CH_b = new BigInteger(Chinese_b.getText());
         } catch(Exception ex){
           if(Chinese_m.getText().isEmpty() || Chinese_n.getText().isEmpty() || Chinese_a.getText().isEmpty() || Chinese_b.getText().isEmpty()){
               JOptionPane.showMessageDialog(Chinese_m, "Please fill form complete");
           } else {
               JOptionPane.showMessageDialog(Chinese_m, "Please type number ONLY!"); //pop up a message if the user type anything expect number
           }
        }
         CH_d = CH_n.modInverse(CH_m); //inverse n modulo n
         display.setText(CH_d.toString());
 
         CH_ab = CH_a.subtract(CH_b); //a-b
         CH_k = (CH_ab.multiply(CH_d)).mod(CH_m); //k=(a-b)i(mod m)
         CH_ans_x = CH_b.add((CH_n.multiply(CH_k))); //x=b+nk
 
         Chinese_k.setText(Chinese_k.getText()+"k: "+CH_k);
         Chinese_Ans_x.setText(Chinese_Ans_x.getText()+"x: "+CH_ans_x);
 
         display.setText(display.getText()+"\ninverse: "+CH_n+" modulo "+CH_m+" is "+CH_d); //d = s+t
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"K =(a-b)i(mod m)");
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"Substitute i = "+CH_d);
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"K = ("+CH_a+" - "+CH_b+") "+CH_d+" (mod "+CH_m+")"); //output ans of inverse n modulo n
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"K = "+CH_k); //output of k=(a-b)i(mod m)
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"x= b + nk");
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"Substitute k = "+CH_k); //output ans k
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"x = "+CH_b+" + ("+CH_n+")("+CH_k+")"); //output of x=b+nk
         display.setText(display.getText()+"\n"); //NEXT LINE
         display.setText(display.getText()+"x = "+CH_ans_x+"\n"); //output ans x
         /*
         if (value1.compareTo(value2)== a)//a is either 0, 1 or -1
         * ==0 value1 equal to value2
         * ==1 value1 more than value2
         * ==-1 value1 less than value2
         */
         if (CH_ans_x.mod(CH_m).compareTo(CH_a.mod(CH_m)) == 0 ) {
            display.setText(display.getText()+CH_ans_x+" ≡ "+CH_a+"(mod "+CH_m+")");
            display.setText(display.getText()+" [True]");
         }
         else{
            display.setText(display.getText()+CH_ans_x+" ≡ "+CH_a+"(mod "+CH_m+")");
            display.setText(display.getText()+" [False]");
         }
         if (CH_ans_x.mod(CH_n).compareTo(CH_b.mod(CH_n)) == 0) {
            display.setText(display.getText()+"\n"+CH_ans_x+" ≡ "+CH_b+"(mod "+CH_n+")");
            display.setText(display.getText()+" [True]");
         }
         else{
            display.setText(display.getText()+"\n"+CH_ans_x+" ≡ "+CH_b+"(mod "+CH_n+")");
            display.setText(display.getText()+" [False]");
         }

how come when i type a=2,b=2,m=2,n=2. the output did not come out.

how come when i type a=2,b=2,m=2,n=2. the output did not come out.

Try debugging the code by adding printlns to show the variables values as they change and the execution flow.

Originally Posted by Norm

Try debugging the code by adding printlns to show the variables values as they change and the execution flow.

Thanks for the help