java怎么将两个变量的值互换

方法一：使用第三个变量进行值互换

```java

int a = 5;

int b = 10;

int temp;

System.out.println("Before swapping: a = " + a + ", b = " + b);

temp = a;

a = b;

b = temp;

System.out.println("After swapping: a = " + a + ", b = " + b);

```

方法二：通过数学运算进行值互换

```java

int a = 5;

int b = 10;

System.out.println("Before swapping: a = " + a + ", b = " + b);

a = a + b;

b = a - b;

a = a - b;

System.out.println("After swapping: a = " + a + ", b = " + b);

```

上述两种方法都可以实现两个变量的值互换，你可以根据自己的喜好选择其中一种方法。