wp/nwyj/sample/samples/technology/reference/ArrayListMain.java

package samples.technology.reference;

import java.util.ArrayList;

import junit.framework.TestCase;

class TestListClone implements Cloneable{
	
	public String intstr = "init value";
	public Test test = new Test();
	
	public void setStr(String str){
		intstr = str;
	}
	
	public Object clone(){
		
		TestListClone o = null;
		try{
		o = (TestListClone)super.clone();
		}catch(CloneNotSupportedException e){
		e.printStackTrace();
		}
		o.test = (Test)test.clone();
		return o;
		
	}
}

class Test implements Cloneable{
	
	public String teststr = "init test value";
	
	public Object clone(){
		
		Test o = null;
		try{
		o = (Test)super.clone();
		}catch(CloneNotSupportedException e){
		e.printStackTrace();
		}
		return o;
		
	}	
	
	
}

public class ArrayListMain {
	
	public static void main(String[] a){
		
		ArrayList a1 = new ArrayList();
		
		TestListClone test = new TestListClone();	
		
		a1.add(0,test);		
		
		TestListClone test1 = (TestListClone)a1.get(0);
		
		System.out.println("before clone,a1= "+ test1.intstr);
		
		ArrayList a2 = new ArrayList();
		   for(int i = 0; i < a1.size(); i ++){
			   TestListClone test2 = (TestListClone) a1.get(i);
			   TestListClone test3 = (TestListClone) test2.clone();			   
			   a2.add(test3);
		   }
		     
		     
		     
		     
		a2.add(1,"add value");
		
		System.out.println("================================="); 
		System.out.println("after clone,a1.size = "+ a1.size());
		System.out.println("after clone,a2.size = "+ a2.size());
		
				
		TestListClone test2 = (TestListClone)a1.get(0);
		TestListClone test3 = (TestListClone)a2.get(0);
				
		//test3.setStr("change value");
		
		System.out.println("================================="); 
		System.out.println("after clone,a1.size = "+ a1.size());
		System.out.println("after clone,a1 = "+ test2.toString());
		System.out.println("after clone,a2 = "+ test3.toString());
		
		System.out.println("after clone,a1 = "+ test2.test.toString());
		System.out.println("after clone,a2 = "+ test3.test.toString());
		
	}

}