Javaベース(オブジェクト向け)

package study_0414;

import java.util.Scanner;

public class BankPrivate {
	
	//private 필드 선언
	private int bankSum;
	
	//생성자
	public BankPrivate(int bankSum) {
		this.bankSum=bankSum;
	}
	
	//메서드
	private void button() {
		for(int i=0;true;i++) {
		Scanner scan=new Scanner(System.in);
		System.out.println(" 1.입금 | 2.출금 | 3.조회 | 4.종료 ");
		int num =scan.nextInt();
		if(num==1) {
			System.out.println("입금할 금액을 입력하세요.");
			int num01 =scan.nextInt();
			deposit(num01);
		}
		else if(num==2) {
			System.out.println("출금할 금액을 입력하세요.");
			int num01 =scan.nextInt();
			withdraw(num01);
			System.out.println("총금액:"+bankSum);
		}
		else if(num==3) {
			check();
		}
		else if(num==4) {
			System.out.println("프로그램을 종료 합니다.");
			break;
		 }
		}
	} 
	
	public void getButton() {
		 button();
	 }
	
	public void deposit(int num01) {
		bankSum+=num01;
	}
	
	public void withdraw(int num01) {
		if(bankSum==0 || bankSum<num01) {
			System.out.println("금액이 부족 합니다.");
			return;
		}
		bankSum-=num01;
	}
	public void check() {
		System.out.println("총금액:"+bankSum);
	}
	
	public void setbankSum(int bankSum) {
		 this.bankSum=bankSum;
	 }
	 
	 public int getbankSum() {
		 return bankSum;
	 }
	
}

package study_0414;

public class BankPrivate_Test {

	public static void main(String[] args) {
		//객체생성
		
		
		BankPrivate myBank=new BankPrivate(0);
		myBank.getButton();	
		
	}

}