java学习【课后笔记】

标签：java   对象   类   

博客：http://blog.csdn.net/muyang_ren

请用封装和构造完成以下练习，无特殊声明处请将属性写成private

package lhy.java_1day;

class student {
	private String 	name="梁惠涌";
	private char 	sex='男';
	private int 	age=18;
	private String 	dire="嵌入式";
	
	public String getName() {
		return name;
	}
	
	public char getSex() {
		return sex;
	}
	
	public int getAge() {
		return age;
	}
	public String getDire() {
		return dire;
	}
}

public class Test_1 {

	public static void main(String[] args) {
		// TODO 自动生成的方法存根
		student lhyStudent = new student();
		System.out.println("name: "+lhyStudent.getName());
		System.out.println("sex : "+lhyStudent.getSex());
		System.out.println("age : "+lhyStudent.getAge());
		System.out.println("dire: "+lhyStudent.getDire());
	}

}

练习二:

package lhy.java_1day;
class tank{
	public int x;
	public int y;
	public char dir;
	public String type;
	
	public tank() {
		// TODO 自动生成的构造函数存根
		this.x = 100;
		this.y = 200;
		this.dir = '下';
		this.type = "重型坦克";
	}
	
	public void ShowData(){
		System.out.println("x = "+this.x);
		System.out.println("y = "+this.y);
		System.out.println("dir = "+this.dir);
		System.out.println("type = "+this.type);
	}
}

public class Test_2 {
	public static void main(String[] args) {
		tank tank_01 = new tank();
		tank_01.ShowData();
	}
}

练习三:

package lhy.java_1day;

class Computer{
	private String name;
	private String type;
	private Double size;
	
	public Computer(){
		this.name = "小新";
		this.type = "联想";
		this.size = 15.6;
	}
	public void showData() {
		System.out.println("name : "+this.name);
		System.out.println("type : "+this.type);
		System.out.println("size : "+this.size);
	}
}
public class Test_3 {

	public static void main(String[] args) {
		Computer lianxiangComputer = new Computer();
		lianxiangComputer.showData();
	}

}

package lhy.java_1day;
class Dog{
	private String name = "小黑";
	private char   sex  = '公';
	
	public void showData(){
		System.out.println("name : "+this.name);
		System.out.println("sex  : "+this.sex);
	}
	
	public void YaoRen(String str){
		if (str == "男人") {
			System.out.println("str = "+str);
			System.out.println("汪汪");
		}else if (str == "女人") {
			System.out.println("str = "+str);
			System.out.println("喔喔");
		}else {
			System.out.println("str = "+str);
			System.out.println("哇哇");
		}
	}
}
public class Test_4 {

	public static void main(String[] args) {
		Dog dog = new Dog();
		dog.showData();
		dog.YaoRen("男人");
		dog.YaoRen("女人");
		dog.YaoRen("小孩");
	}

}

练习五:

4） 创建一个老师对象，调用其ShowData();

package lhy.java_1day;

import java.util.Scanner;

class Teacher{
	private int  	id;
	private String 	name;
	private String 	sex;
	private int 	age;
	private Double 	height;
	
	public void setId(int id) {
		this.id = id;
	}
	
	public void setName(String name) {
		if (name.length()>1 ||(name.length() <4)) {
			this.name = name;
		}else {
			System.out.println("名字长度出错");
			System.out.println("请输入: name");
			setName(new Scanner(System.in).next());
		}
	}
	
	public void setSex(String sex) {

		if (sex.equals("男") || sex.equals("女")) {
			this.sex = sex;	
		}else {
			System.out.println("性别输入错误（男 or 女）");
			setSex(new Scanner(System.in).next());
		}
	}
	
	public void setAge(int age) {

		if (age>20&&age<55) {
			this.age = age;
		}else {
			System.out.println("年龄输入错误（20~55）");
			System.out.println("请输入: 年龄");
			setAge(new Scanner(System.in).nextInt());
		}
	}
	
	public void setHeight(Double height) {

		if (height>1.5 && height<1.8) {
			this.height = height;
		}else {
			System.out.println("身高输入错误（1.5~1.8）");
			System.out.println("请输入: 身高");
			setHeight(new Scanner(System.in).nextDouble());
		}
	}
	
	public void showData(){
		System.out.println("    ID :"+this.id);
		System.out.println("  name :"+this.name);
		System.out.println("   sex :"+this.sex);
		System.out.println("   age :"+this.age);
		System.out.println("height :"+this.height);
	}
}

public class Test_5 {

	public static void main(String[] args) {
		Teacher teacher = new Teacher();
	    Scanner stdin = new Scanner(System.in);
		System.out.println("请输入：ID");
		teacher.setId(stdin.nextInt());
		System.out.println("请输入: name");
		teacher.setName(stdin.next());
		System.out.println("请输入: 年龄");
		teacher.setAge(stdin.nextInt());
		System.out.println("请输入: 性别");
		teacher.setSex(stdin.next());
		System.out.println("请输入: 身高");
		teacher.setHeight(stdin.nextDouble());
		stdin.close();
		
		teacher.showData();
	}
}

练习六:

14) 调用该榨汁机对象的GetFruitZhi(Fruit f)方法,打印结果为:一杯黄色的桔子汁，味道甜甜的

package lhy.java_1day;

class Fruit{
	public String name;
	public String color;
	public String weidao;
	
	public Fruit(String name,String color,String weidao){
		this.name=name;
		this.color=color;
		this.weidao=weidao;
	}
	
	public Fruit(){
	}
	
	public String GetMsg(){
			return this.name+","+this.color+","+this.weidao;
	}
}
class ZhaFruit{
	public String GetFruitZhi(Fruit f){
		String string ="一杯"+f.color+"的"+f.name+"汁,味道"+f.weidao;
		return string;
	}
}

public class Test_6 {

	private static String msg;

	public static void main(String[] args) {
		Fruit fruit1 = new Fruit("苹果","青色","酸酸的");
		msg = fruit1.GetMsg();
		System.out.println(msg);
		ZhaFruit zhafuit1 =new ZhaFruit();
		System.out.println(zhafuit1.GetFruitZhi(fruit1));
		
		Fruit fruit2 = new Fruit("桔子","黄色","甜甜的");
		ZhaFruit zhafuit2 =new ZhaFruit();
		System.out.println(zhafuit2.GetFruitZhi(fruit2));
		
	}

}

java学习【课后笔记】

标签：java   对象   类   

原文地址：http://blog.csdn.net/muyang_ren/article/details/46389487