演示 Java 中的 clone() 方法
java 8object oriented programmingprogramming
可以使用 Java 中的 clone() 方法克隆对象。被克隆对象的类应实现接口 java.lang.Cloneable，否则使用 clone() 方法时会抛出异常 CloneNotSupportedException。
下面给出了一个演示 Java 中的 clone() 方法的程序:
示例
class CloneClass implements Cloneable {
int x;
char y;
CloneClass cloneFunc() {
try {
return (CloneClass) super.clone();
} catch (CloneNotSupportedException e) {
System.out.println("Cloning cannot be done");
return this;
}
}
}
public class Demo {
public static void main(String args[]) {
CloneClass obj1 = new CloneClass();
CloneClass obj2;
obj1.x = 8;
obj1.y = 'A';
obj2 = obj1.cloneFunc();
System.out.println("For object obj1");
System.out.println("obj1.x = " + obj1.x);
System.out.println("obj1.y = " + obj1.y);
System.out.println("
For object obj2");
System.out.println("obj2.x = " + obj2.x);
System.out.println("obj2.y = " + obj2.y);
}
}
输出
For object obj1 obj1.x = 8 obj1.y = A For object obj2 obj2.x = 8 obj2.y = A
