package kenhouzuoye;

public class Queue {
	String name;//姓名
	int avg;//年齡
	public Queue(String name, int avg) {
		super();
		this.name = name;
		this.avg = avg;
	}
	public void print() {
		System.out.println("姓名是:"+this.name+"\t年齡是:"+this.avg);
	}
}
package kenhouzuoye;

import java.util.LinkedList;

public class Test {

	public static void main(String[] args) {
		LinkedList lk =new LinkedList();
		Queue qu = new Queue("張三", 25);
		Queue qu1 = new Queue("李四", 20);
		Queue qu2 = new Queue("王五", 22);
		lk.add(qu);
		lk.add(qu1);
		lk.add(qu2);
		//使用addFirst()方法在對列首位新增元素"趙六", 39
		lk.addFirst(new Queue("趙六", 39));
		//用foreach迴圈輸出新增新元素後的列表
		int index=0;
		for (Object object : lk) {
			Queue qu3 =(Queue)lk.get(index);
			qu3.print();
			index++;
		}
		System.out.println("*****************************");
		lk.removeLast();//用removeLast()方法刪除列表最後一個元素
		//用foreach迴圈輸出刪除後的列表
		int index2=0;
		for (Object object : lk) {
			Queue qu3 =(Queue)lk.get(index2);
			qu3.print();
			index2++;
		}
	}

}
 

package kenhouzuoye2;

import java.util.HashMap;

public class TestMap {

	public static void main(String[] args) {
		HashMap ha =new HashMap();
		ha.put("小明", 98);
		ha.put("小華", 99);
		ha.put("小杰", 89);
		//用keySet()方法取到所有的'鍵'
		for (Object sco : ha.keySet()) {
			//用get(sco)方法取的相對應的值
			System.out.println(sco+"成績為:"+ha.get(sco));
		}
		System.out.println("******************************");
		//使用ptu()方法修改'鍵':的值，那麼原來的值將被替換掉
		ha.put("小華", 50);
		for (Object sco : ha.keySet()) {
			//用get(sco)方法取的相對應的值
			System.out.println(sco+"成績為:"+ha.get(sco));
		}
	}

}