java写一个类，并测试它

Posted 2020-11-03 虎虎地程序员

这是Student类

package com.ma_0002;
/**
 * 建立一个学生类，重写toString()方法
 * @author TP
 *
 */
public class Student {
	/************成员变量区****************/
	/**学生姓名*/
	String name;
	/**学生年龄*/
	int age;
	
	/************构造方法区****************/
	public Student() {
		super();
	}
	public Student(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
	
	/************get和set方法区****************/
	
	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;
	}
	/************重写了toString()方法****************/
	@Override
	public String toString() {
		return "Student [name=" + name + ", age=" + age + "]";
	}

}

　　

这是测试类StudentTest

package com.ma_0002;
/**
 * Student测试类
 * @author TP
 *
 */
public class StudentTest {
	
	/*
	 * 需求：
	 * 	创建几个Student对角，并把它们放入一个数组中，然后输出
	 * 
	 * 分析：
	 * 	 1.用Student构造方法创建对象
	 * 	 2.创建一个Student[]数组来放对象
	 * 	 3.输出 
	 */
	
	public static void main(String[] args) {
		//创建一个学生类对象
		Student s = new Student("张大",1);
		Student s2 = new Student("张二",2);
		Student s3 = new Student("张三",3);
		Student s4 = new Student("张四",4);
		Student s5 = new Student("张五",5);
		Student s6 = new Student("张六",6);
		
		//创建一个Student[]数组来放对象
		Student[] stuArr = new Student[6];
		//给数组赋值
		stuArr[0]  = s;
		stuArr[1]  = s2;
		stuArr[2]  = s3;
		stuArr[3]  = s4;
		stuArr[4]  = s5;
		stuArr[5]  = s6;
		
		//遍历输出数组元素
		for (int i = 0; i < stuArr.length; i++) {
			System.out.println("s"+i+" : "+stuArr[i]);
		}
		
		
		
	}

}

　　执行结果：

s0 : Student [name=张大, age=1]
s1 : Student [name=张二, age=2]
s2 : Student [name=张三, age=3]
s3 : Student [name=张四, age=4]
s4 : Student [name=张五, age=5]
s5 : Student [name=张六, age=6]