方法一,引入第三方变量
public class Mock {
public static void main(String[] args) {
int a = 20;
int b = 10;
int temp = 0;
System.out.println("交换前:"+"a="+a+"\t"+ "b="+b);
temp = a;
a = b;
b = temp;
System.out.println("交换后:"+"a="+a+"\t"+ "b="+b);
}
}
方法二,不引入第三方变量
public class Mock {
public static void main(String[] args) {
int a = 20;
int b = 10;
System.out.println("交换前:"+"a="+a+"\t"+ "b="+b);
a = a + b;
b = a - b;
a = a - b;
System.out.println("交换后:"+"a="+a+"\t"+ "b="+b);
}
}
方法三,不引入第三方变量
public class Mock {
public static void main(String[] args) {
int a = 20;
int b = 10;
System.out.println("交换前:"+"a="+a+"\t"+ "b="+b);
a = a ^ b;
b = a ^ b;
a = a ^ b;
System.out.println("交换后:"+"a="+a+"\t"+ "b="+b);
}
}