?? clonedemo2.java~2~
字號:
package clone;
/**
下面的例子重載clone( )方法以便它能被其類外的程序所調(diào)用。為了完成這項功能,它
的存取說明符必須是public,如下所示:
*/
// Override the clone() method.
class TestClone
implements Cloneable {
int a;
double b;
// clone() is now overridden and is public.
public Object clone() {
try {
// call clone in Object.
return super.clone();
}
catch (CloneNotSupportedException e) {
System.out.println("Cloning not allowed.");
return this;
}
}
}
class CloneDemo2 {
public static void main(String args[]) {
TestClone x1 = new TestClone();
TestClone x2;
x1.a = 10;
x1.b = 20.98;
// here, clone() is called directly.
x2 = (TestClone) x1.clone();
System.out.println("x1: " + x1.a + " " + x1.b);
System.out.println("x2: " + x2.a + " " + x2.b);
}
}
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