JAVA 8-1 继承的练习

最新推荐文章于 2024-04-09 19:20:58 发布

原创最新推荐文章于 2024-04-09 19:20:58 发布 · 3k 阅读

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#java #class #string #float #测试 #c

People父类：

public class People {
	
	float height = 0.0f;
	int weight = 0;
	
	People()
	{
		this.height = height;
		this.weight = weight;
	}
	
	public void speakHello()
	{
		System.out.println("你好");
	}


	
	public void averageWeight()
	{
		
	}
	
	public void averageHeight()
	{
	}	
ChinaPeople 子类：

public class  ChinaPeople extends People {
	
	ChinaPeople()
	{
		this.height = height;
		this.weight = weight;
	}
	
	public void chinaMartial()
	{
		System.out.println("中国是崇尚和平的，人不犯我我不犯人，人若犯我，嘿嘿~~");
	}
	
	public void averageWeight()
	{
		weight = 110;
		System.out.println("中国人平均体重是   "+weight);
	}
	
	public void averageHeight()
	{
		height = 1.75f;
		System.out.println("中国人平均身高是   "+height);
	}
	
	public void speakHello()
	{
		System.out.println("中国你好");
	}

}

AmaricanPeople子类：

public class AmericanPeople extends People {
	
	AmericanPeople()
	{
		this.height = height;
		this.weight = weight;
	}
	
	public void AmericanBoxing()
	{
		System.out.println("美国的拳击超棒 ， 看看WWE你就知道到底有多帅了");
	}
	
	public void averageWeight()
	{
		weight = 120;
		System.out.println("美国人平均体重是   "+weight);
	}
	
	public void averageHeight()
	{
		height = 1.80f;
		System.out.println("美国人平均身高是   "+height);
	}
	
	public void speakHello()
	{
		System.out.println("美国你好");
	}


}

BeijingPeople 子类：

public class BeijingPeople  extends ChinaPeople {
	
	BeijingPeople()
	{
		this.height = height;
		this.weight = weight;
	}
	
	public void BeijingOpera()
	{
		System.out.println("京剧源远流长 ， so cool");
	}
	
	public void averageWeight()
	{
		weight = 110;
		System.out.println("北京人平均体重是   "+weight);
	}
	
	public void averageHeight()
	{
		height = 1.75f;
		System.out.println("北京人平均身高是   "+height);
	}
	
	public void speakHello()
	{
		System.out.println("北京人你好");
	}
	
	

}

Test 测试类：

public class Test {
	
	public static void main(String args[])
	{
	
		People p = new People();
		p.speakHello();
		
		ChinaPeople c = new ChinaPeople();
		c.speakHello();
		c.chinaMartial();
		c.averageHeight();
		c.averageWeight();
		
		AmericanPeople a = new AmericanPeople();
		a.speakHello();
		a.AmericanBoxing();
		a.averageHeight();
		a.averageWeight();
		
		BeijingPeople  b = new BeijingPeople ();
		b.speakHello();
		b.BeijingOpera();
		b.averageHeight();
		b.averageWeight();
		
		
	}

}

运行结果：

你好
中国你好
中国是崇尚和平的，人不犯我我不犯人，人若犯我，嘿嘿~~
中国人平均身高是   1.75
中国人平均体重是   110
美国你好
美国的拳击超棒，看看WWE你就知道到底有多帅了
美国人平均身高是   1.8
美国人平均体重是   120
北京人你好
京剧源远流长， so cool
北京人平均身高是   1.75
北京人平均体重是   110