arraylistget_setdemo.java

JAVA编程思想源代码 值得一下 很难找的

package chapter9;

import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListGet_SetDemo {

	public static void main(String[] args) {
		ArrayList<String> col = new ArrayList<String>();
		for (int i = 0; i < 5; i++) {
			col.add(String.valueOf(i));
		}

		System.out.println("开始时 col中的元素有：");
		for (int i = 0; i < col.size(); i++)
			System.out.println("element at " + i + " is " + col.get(i));
		col.set(4, String.valueOf(50));
		System.out.println("在修改其中一个元素后 col中的元素有：");
		for (Iterator<String> iter = col.iterator(); iter.hasNext();)
			System.out.println("the element  is :" + iter.next());

	}

}