Need help. I am not able to get the desired display of output in my program.

[pcmechanic]

Here is my sample program.

import java.io.*;

public class trial1{

public static InputStreamReader reader = new InputStreamReader (System.in);
public static BufferedReader input = new BufferedReader(reader);

public static void main(String[]args)throws Exception{

String num1 = "";
String num3 = "";
int num0=0;
int num2=0;

while (num0<10) {


System.out.print("Enter numbers a: ");
num0 = Integer.parseInt(input.readLine());
num1+=num0;

System.out.print("Enter numbers b: ");
num2 = Integer.parseInt(input.readLine());
num3+=num2;


}
System.out.println(num1+num3);
} }

// Example input
// Enter numbers a: 1
// Enter numbers b: 3
// Enter numbers a: 6
// Enter numbers b: 4
// Enter numbers a: 11
// Enter numbers b: 9

// Output:
// 1611349

// Desired output:
// 1 3
// 6 4
// 11 9

[Norm]

If you want two numbers to print instead of the sum of the numbers you need to insert a String between the numbers:
(1 + " " + 2) will give "1 2"
(1+2) will give "3"