부산IT JAVA 3-3

TriangleMain.java

package com.day03;

import java.util.Scanner;

class Triangle{
	double bottom,height;
	
	Triangle(){}
	
	public Triangle(double bottom, double height){
		this.bottom=bottom;
		this.height=height;
	}
	
	public double getArea() {
		return (double)bottom*height/2;
	}
	
	public void setBottom(double bottom) {
		this.bottom=bottom;
	}
	
	public void setHeight(double height) {
		this.height=height;
	}
}

public class TriangleMain {

	public static void main(String[] args) {
		//Triangle tr1=new Triangle(10.2, 17.3);
		//System.out.println("삼각형의넓이:"+tr1.getArea());
		
		//tr1.setBottom(7.5);
		//tr1.setHeight(11.2);
		//System.out.println("삼각형의넓이:"+tr1.getArea());
		
		
		//밑변과 높이를 입력받아 삼격형의 넓이 구하기
		Scanner sc = new Scanner(System.in);
		System.out.println("밑변과 높이를 입력하시오.>");
		
		double bottom = sc.nextDouble();
		double height = sc.nextDouble();
		
		Triangle tr = new Triangle(bottom,height);
		System.out.println("삼각형의넓이:"+tr.getArea());		
	}
}

TVMain.java

package com.day03;

public class TVMain {

	public static void main(String[] args) {
		TV tv1 = new TV("LG",2021,65);
		tv1.show(); //LG에서 만든 2021 년도형 65인치 TV 이렇게 출력
		
		TV tv2 = new TV("삼성",2020);
		tv2.show();
		
		TV tv3 = new TV("LG",2022,55);
		tv3.show();
	}
}

TV.java

package com.day03;

public class TV {

	String maker;
	int year,inch;
	
	public TV(String maker, int year, int inch) {
		this.maker=maker;
		this.year=year;
		this.inch=inch;
	}
	
	public TV(String maker, int year) {
		this.maker=maker;
		this.year=year;
			
	}
	
	public void show() {
		if(inch==0)
			System.out.println(maker+"에서 만든"+year+" 년도형 TV");
		else
			System.out.println(maker+"에서 만든"+year+" 년도형 "+inch+"인치 TV");
		
//		int num=0; //지역변수는 반드시!! 초기값 있어야 함
//		System.out.println(num);
	}	
}

Account.java

package com.day03.cooperation;

public class Account {
private String name;
private int money;

public Account(String name, int money) {
	this.name=name;
	this.money=money;
}

public void inputMoney(int money) {
	this.money+=money;
}

public void outputMoney(int money) {
	//this.money-=money;
	if(this.money < money) {
		System.out.println(name+" 님 잔액부족");
		return; //종료
	}
	else {
		this.money-=money;		
	}
}
	
public void getMoney() {
	System.out.println(name+"님의 잔액은 "+money+" 입니다.");
}
	
//	public static void main(String[] args) {
//		Account ac1 = new Account("홍길동",6000);
//		ac1.inputMoney(5000);
//		ac1.outputMoney(17000);
//		ac1.getMoney(); //홍길동님의 잔액은 -2000원 입니다.
//		System.out.println(ac1.name);
//	
//	}

//getter
public String getName() {
	return name;
}

public int get_Money() { //getMoney는 이미 있어서 get_Money로 씀
	return money;
}
//setter
public void setMoney(int money) {
	this.money=money;
}
}

AccountMain.java

package com.day03.cooperation;

public class AccountMain {

	public static void main(String[] args) {
		Account ac1 = new Account("홍길동",6000);
		ac1.inputMoney(5000);
		ac1.outputMoney(17000);
		ac1.getMoney(); //홍길동님의 잔액은 -2000원 입니다.
		//System.out.println(ac1.name);
		
		//getter
		System.out.println(ac1.getName());
		System.out.println(ac1.get_Money());
		
		//setter
		ac1.setMoney(9999);
		System.out.println(ac1.get_Money());		
	}
}