[Swing] JFrame 계산기 만들기

package swing.frame;

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Calculator extends JFrame {

	public Calculator(String title) {
		
		//this없어도됨 //title설정
		setTitle(title);
		//size설정(width,height)
		setSize(230, 400);
		//위치 설정(x,y)
		setLocation(800, 300);
		//종료관리(보통 EXIT_ON_CLOSE를 사용, 상수3)
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	
		//패널 선언
		JPanel jp1 = new JPanel();
		JPanel jp2 = new JPanel();
		JPanel jp3 = new JPanel();
		
		//jp1 레이아웃설정
		this.add(jp1);
		jp1.setLayout(new FlowLayout());
		
		//jp2 레이아웃
		jp2.setLayout(new GridLayout(4,4));
		jp2.setPreferredSize(new Dimension(220,220));
		
		//jp2 1번줄
		JButton b1 = new JButton("1");
		jp2.add(b1);
		
		JButton b2 = new JButton("2");
		jp2.add(b2);
		
		JButton b3 = new JButton("3");
		jp2.add(b3);

		JButton bminer = new JButton("-");
		jp2.add(bminer);
		
		//jp2 2번줄
		JButton b4 = new JButton("4");
		jp2.add(b4);
		
		JButton b5 = new JButton("5");
		jp2.add(b5);
		
		JButton b6 = new JButton("6");
		jp2.add(b6);

		JButton bplus = new JButton("+");
		jp2.add(bplus);
		
		//jp2 3번줄
		JButton b7 = new JButton("7");
		jp2.add(b7);
		
		JButton b8 = new JButton("8");
		jp2.add(b8);
		
		JButton b9 = new JButton("9");
		jp2.add(b9);

		JButton bgob = new JButton("*");
		jp2.add(bgob);
		
		//jp2 4번줄
		JButton b0 = new JButton("0");
		jp2.add(b0);
		
		JButton bdot = new JButton(".");
		jp2.add(bdot);
		
		JButton beq = new JButton("=");
		jp2.add(beq);

		JButton bna = new JButton("/");
		jp2.add(bna);
		
		//jp3 레이아웃
		jp3.setLayout(new FlowLayout(FlowLayout.RIGHT));
		jp3.setPreferredSize(new Dimension(220,100));
		
		//jp3 내용
		JLabel text1 = new JLabel("만든이 : ㅁㄴㅇ");
		JLabel text2 = new JLabel("eMail : ㅁㄴㅇ@naver.com");
		
		jp3.add(text1);
		jp3.add(text2);
		
		//clear 버튼 선언
		JButton Clear = new JButton("Clear");
		//버튼 사이즈 설정
		Clear.setPreferredSize(new Dimension(220,30));
			
		//전체내용
		JLabel idlbl = new JLabel("Swing으로 구현한 계산기");
		jp1.add(idlbl);
		JTextField idtf = new JTextField(24);
		jp1.add(idtf);
		jp1.add(jp2);
		jp1.add(Clear);
		jp1.add(jp3);
				
				
		//창이 계속보이게 함
		this.setVisible(true);
		
	}
	
	public static void main(String[] args) {
		//인수로 넣음
		new Calculator("계산기");
		
	}

}