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package xiangmu;
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public class Ceshi {
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public static void main(String args[]) {
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int a = 3;
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int b = 5;
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int c = 0;
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dayin("交换前：");
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dayin("a: " + a);
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dayin("b: " + b);
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c = a; // 通过临时变量c存储变量a中的值，避免被直接覆盖
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a = b;
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b = c;
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dayin("交换后：");
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dayin("a: " + a);
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dayin("b: " + b);
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}
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public static void dayin(Object obj) {
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System.out.println(obj);
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}
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}
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交换前：
a: 3
b: 5
交换后：
a: 5
b: 3