Java 代码补充：交换两个变量的值并求和

public class A{ public static void main(String args[]){ int a=5,b=6; a= 'b'; b=a-b; a='a' + 'b'; System.out.println('a='+a+ 'b='+b); } }

int temp = a; a = b; b = temp; a = a + b;