java基礎篇-練習一

//Person.java

/**
 * @author [email protected]
 * 實體類Person
 */
public class Person {
	private String name;//姓名
	private String age;//年齡
	private String id;//學號
	private String score;//成績
	
	public Person() {
		super();
	}

	public Person(String name, String age, String id, String score) {
		super();
		this.name = name;
		this.age = age;
		this.id = id;
		this.score = score;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAge() {
		return age;
	}

	public void setAge(String age) {
		this.age = age;
	}

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getScore() {
		return score;
	}

	public void setScore(String score) {
		this.score = score;
	}

	@Override
	public String toString() {
		return "Person [name=" + name + ", age=" + age + ", id=" + id
				+ ", score=" + score + "]";
	}
}

import java.util.ArrayList;
import java.util.List;

//Operate.java
/**
 * @author [email protected]
 * 操作類
 */
public class Operate {
	private List<Person> mList;
	
	public Operate(){
		mList = new ArrayList<Person>();
	}
	
	public Operate(List<Person> list){
		if(list == null){
			mList = new ArrayList<Person>();
		}else {
			mList = list;
		}
	}
	
	/**
	 * 增加操作
	 */
	public void add(Person person){
		mList.add(person);
	}
	
	/**
	 * 刪除操作
	 */
	public void remove(Person person){
		mList.remove(person);
	}
	
	/**
	 * 查詢操作
	 */
	public void query(Person person) {
		int index = 0;
		for(int i=0;i<mList.size();i++){
			if(person.getId().equals(mList.get(i).getId())){
				index = i;
				break;
			}
		}
		System.out.println("index= " + index);
	}
	
	/**
	 * 修改操作
	 */
	public void modify(Person person) {
		for(int i=0;i<mList.size();i++){
			if(person.getId().equals(mList.get(i).getId())){
				mList.remove(i);
				mList.add(person);
			}
		}
	}
	
	public void print() {
		for(int i=0;i<mList.size();i++){
			System.out.println("name= " + mList.get(i).getName() + "\n"
					+ "age= " + mList.get(i).getAge() + "\n"
					+ "id= " + mList.get(i).getId() + "\n"
					+ "score= " + mList.get(i).getScore());
		}
	}
}

import java.util.ArrayList;
import java.util.List;

//Main.java
/**
 * @author [email protected]
 * @version 2012-2-22
 */
public class Main {
	
	public static void main(String[] args){
		/**
		 * 初始數據
		 */
		Person person = new Person("wuyongpeng", "24", "1", "60");
		Person person2 = new Person("sunqing","22","2","70");
		Operate operate = new Operate();
		
		/**
		 * 驗證增加操作
		 */
		operate.add(person);
		operate.add(person2);
		operate.print();
		
		/**
		 * 驗證刪除操作
		 */
		operate.remove(person2);
		operate.print();
		
		/**
		 * 驗證查詢操作
		 */
		operate.query(person);
		
		/**
		 * 驗證修改操作
		 */
		person.setScore("65");
		operate.modify(person);
		operate.print();
	}
}