JAVA的输入输出基本操作样例

这些类的继承关系有些类似，弄一个作为样例，理解一下其中的机制。

package cc.openhome;

import java.io.*;

public class Member {
    private String number;
    private String name;
    private int age;

    public Member(String number, String name, int age) {
        this.number = number;
        this.name = name;
        this.age = age;
    }

    @Override
    public String toString() {
        return String.format("(%s, %s, %d)", number, name, age);
    }

    public void save() {
        try{
            DataOutputStream output = new DataOutputStream(new FileOutputStream(number));
            output.writeUTF(number);
            output.writeUTF(name);
            output.writeInt(age);
        } catch(IOException ex) {
            throw new RuntimeException(ex);
        }
    }

    public static Member load(String number) {
        Member member = null;
        try {

            DataInputStream input = new DataInputStream(new FileInputStream(number));
            member = new Member(input.readUTF(), input.readUTF(), input.readInt());
        } catch(IOException ex) {
            throw new RuntimeException(ex);
        }
        return member;
    }
}

package cc.openhome;

import java.io.*;

public class MemberDemo {
    public static void main(String[] args) {
        Member[] members = { new Member("B1234", "Justing", 90),new Member("B4532", "Monica", 87)};
        for(Member member : members) {
            member.save();
        }
        System.out.println(Member.load("B1234"));
    }
}