学步园

public class Test {<br /> static int a = 1, b = 2;</p> <p> public static void change1() {<br /> int t = 0;<br /> t = a;<br /> a = b;<br /> b = t;<br /> System.out.println("a= " + a + "/tb= " + b);<br /> }</p> <p> public static void change2() {<br /> a = a + b;<br /> b = a - b;<br /> a = a - b;<br /> System.out.println("a= " + a + "/tb= " + b);<br /> }</p> <p> public static void change3() {<br /> a = a ^ b;<br /> b = a ^ b;<br /> a = a ^ b;<br /> System.out.println("a= " + a + "/tb= " + b);<br /> }</p> <p> public static void change4() {<br /> a = b + (b = a) * 0;<br /> System.out.println("a= " + a + "/tb= " + b);<br /> }</p> <p> public static void main(String[] args) {<br /> change1();<br /> // change2();<br /> // change3();<br /> // change4();<br /> }</p> <p>}</p> <p>