java的值传递和引用传递

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package myPage;public class ChangeTest {public static void main(String[] args){String abc = "before";change(abc);System.out.println(abc);}public static void change(String string){string = "after change";}}package myPage;public class ChangeTest {private String abc;public String getAbc() {return abc;}public void setAbc(String abc) {this.abc = abc;}public static void change(ChangeTest changeTest , String info){changeTest.setAbc(info);}public static void main(String[] args){ChangeTest test = new ChangeTest();test.setAbc("before");change(test, "after change");System.out.println(test.getAbc());}}?第二个例子，我们是将changeTest引用对象交给change方法，而在change方法里会获得一个changeTest引用的拷贝，在change方法里对changeTest引用所指向的对象进行操作，所以changeTest的所指向的对象值会改变。 1 楼 stone5751 2011-03-24 收教了！~