import java.util.Scanner; 
public class VariableExchange { 
  public static void main(String args[]){ 
    Scanner scan = new Scanner(System.in); 
    System.out.println("请输入第一个整数变量:"); 
    long A = scan.nextLong(); 
    System.out.println("请输入第二个整数变量:"); 
    long B = scan.nextLong(); 
    System.out.println("A="+A+"\tB="+B); 
    System.out.println("执行变量互换后......"); 
    A = A^B; //执行变量互换 
    B = B^A; 
    A = A^B; 
    System.out.println("A="+A+"\tB="+B); 
  }  
} 

run: 
请输入第一个整数变量: 
100 
请输入第二个整数变量: 
200 
A=100  B=200 
执行变量互换后...... 
A=200  B=100 
BUILD SUCCESSFUL (total time: 5 seconds)