关于(基本类型/引用类型)... (变量名/对象名)的…

2019-05-08 07:31:47来源：博客园阅读 ()

今天做程序发现一个问题，就是关于不定参数的形参传入方法中的方式，分别是testInt和testVoid两个方法：

package com.lgq.servlet;

import java.util.ArrayList;

import javax.print.attribute.IntegerSyntax;

/**
 * 
 * @author 作者 MichaelLee
 * 
 * @version 创建时间：2019年5月6日 上午11:50:39
 * 
 *          类说明
 * 
 */
public class Hello {
    public static void main(String[] args) {
        String string = null;
//    System.out.println(string);
        string = "hello";
//    System.out.println(string);
        ArrayList<Person> pList = new ArrayList<Person>();
        pList.add(new Person("LI", 13));
//    System.out.println(pList.toString());
        pList.add(new Person("sun", 12));
//    System.out.println(pList.toString());
        Person per1 = new Person("LI", 13),
//    System.out.println(per1);
        per2 = new Person("sun", 15);
//            per2 = new Person("sun", 12);
//    System.out.println(per1.toString());
//    System.out.println(per2.toString());
//        System.out.println(per1);
        
        testVoid(per1, per2);
        testInt(1, 2, 3, 4);
    }
    private static void testInt(int... a) {
        // TODO Auto-generated method stub
        for (int i = 0; i < a.length; i++) {
            System.out.println(a[i]);
        }
    }
    //测试String...
    public static void testVoid(Person... a) {
        for (int i = 0; i < a.length; i++) {
            System.out.println(a[i].toString());
        }
    }

}

class Person {
    String name;
    int age;

    Person() {
    }

    public Person(String name, int age) {
        // TODO Auto-generated constructor stub
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

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

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return "[" + getName() + "," + getAge() + "]";
    }

}