자바GUI4(국비과정)

min seung moon·2021년 3월 12일

영진직업전문학교

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5/10

색상 다뤄보기!

01. 버튼의 색깔 넣어보기!

import javax.swing.*;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


class MyFrame01 extends JFrame {
	private JButton redButton, blueButton, yellowButton, bgButton;
	private JPanel panel; 
	private String prevBtn = "";
	// Frame에는 배경색을 줄 수가 없다
	public MyFrame01() {
		setTitle("버튼이벤트1");
//		setSize(300, 250);
		// 위치와 사이즈를 동시에 지정가능
		setBounds(400, 300, 300, 200);
		setLayout(new FlowLayout());
		setVisible(true);
		
		panel = new JPanel();
		redButton = new JButton("빨간색");
		blueButton = new JButton("파란색");
		yellowButton = new JButton("노란색");
		bgButton = new JButton("배경색");
		
		redButton.setBackground(Color.WHITE);
		blueButton.setBackground(Color.WHITE);
		yellowButton.setBackground(Color.WHITE);
		bgButton.setBackground(Color.WHITE);
		
		redButton.addActionListener(new Event());
		blueButton.addActionListener(new Event());
		yellowButton.addActionListener(new Event());
		bgButton.addActionListener(new Event());
		
		add(redButton);
		add(blueButton);
		add(yellowButton);
		add(bgButton);
		add(panel);
	}
	class Event implements ActionListener {
		private void setInit(String prevBtn) {
			if(prevBtn.equals("빨간색")){
				redButton.setBackground(Color.WHITE);
				redButton.setForeground(Color.BLACK);
			}else if(prevBtn.equals("파란색")){
				blueButton.setBackground(Color.WHITE);
				blueButton.setForeground(Color.BLACK);
			}else if(prevBtn.equals("노란색")){
				yellowButton.setBackground(Color.WHITE);
				yellowButton.setForeground(Color.BLACK);
			}
		}
		private void changeInit(String btn) {
			if(btn.equals("빨간색")){
				redButton.setBackground(Color.RED);
				redButton.setForeground(Color.WHITE);
			}else if(btn.equals("파란색")){
				blueButton.setBackground(Color.BLUE);
				blueButton.setForeground(Color.WHITE);
			}else if(btn.equals("노란색")){
				yellowButton.setBackground(Color.YELLOW);
				yellowButton.setForeground(Color.WHITE);
			}
		}
		@Override
		public void actionPerformed(ActionEvent e) {
			String source = e.getActionCommand();
//			Object btn = e.getSource();
			JButton btn = (JButton) e.getSource();
			switch (source) {
			case "빨간색":
				setInit(prevBtn);
				changeInit(source);
				prevBtn = source;
				break;
			case "파란색":
				setInit(prevBtn);
				changeInit(source);
				prevBtn = source;
				break;
			case "노란색" :
				setInit(prevBtn);
				changeInit(source);
				prevBtn = source;
			case "배경색" :
				panel.setBackground(Color.GRAY);
			default:
				break;
			}
			
		}
	}
}

public class ex01{
		public static void main(String[] args) {
			MyFrame01 frame01 = new MyFrame01();
		}
}

02. 외부 이벤트 예제

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

class MyFrame02 extends JFrame{
	JButton button;
	
	public MyFrame02() {
		setTitle("외부 이벤트 예제");
		setSize(300, 250);
		setVisible(true);
		setLayout(new FlowLayout());
		
		button = new JButton("클릭");
		button.addActionListener(new MyListener());
		
		add(button);
	}
}

// 독립적인 클래스로 이벤트 처리기 작성
class MyListener implements ActionListener {

	@Override
	public void actionPerformed(ActionEvent e) {
		// getSource() 이벤트를 발생시킨 객체를 식별, Object 반환, 타입 변환
		JButton button = (JButton) e.getSource();
		if(e.getSource() == button) {
			button.setText("마침내 버튼이 눌러졌습니다");
		}
		
	}
	
}

public class ex02 {
	public static void main(String[] args) {
		MyFrame02 frame02 = new MyFrame02();
	}
}

03. inner 이벤트 예제

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

class MyFrame03 extends JFrame{
	JButton button;
	
	public MyFrame03() {
		setTitle("inner 이벤트 예제");
		setSize(300, 250);
		setVisible(true);
		setLayout(new FlowLayout());
		
		button = new JButton("클릭");
		button.addActionListener(new MyListener());
		
		add(button);
	}
	
	// inner class
	class MyListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent e) {
			// getSource() 이벤트를 발생시킨 객체를 식별, Object 반환, 타입 변환
			JButton button = (JButton) e.getSource();
			if(e.getSource() == button) {
				button.setText("마침내 버튼이 눌러졌습니다");
			}
			
		}
		
	}
	
}

public class ex03 {
	public static void main(String[] args) {
		MyFrame03 frame03 = new MyFrame03();
	}
}

04. class에 동시 상속 이벤트 예제!

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

class MyFrame04 extends JFrame implements ActionListener {
	private JPanel panel;
	private JButton button;
	
	public MyFrame04() {
		setTitle("동시 상속 이벤트 예제");
		setSize(300, 250);
		setVisible(true);
		setLayout(new FlowLayout());
		
		button = new JButton("클릭");
		button.addActionListener(this);
		
		add(button);
	}
	
	@Override
	public void actionPerformed(ActionEvent e) {
		// getSource() 이벤트를 발생시킨 객체를 식별, Object 반환, 타입 변환
		if(e.getSource() == button) {
			button.setText("마침내 버튼이 눌러졌습니다");
		}
	}
	
	
}

public class ex04 {
	public static void main(String[] args) {
		MyFrame04 frame04 = new MyFrame04();
	}
}

05. 익명(무명)함수 클래스 예제

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

class MyFrame05 extends JFrame implements ActionListener {
	private JPanel panel;
	private JButton button;
	
	public MyFrame05() {
		setTitle("asd 클래스 이벤트 예제");
		setSize(300, 250);
		setVisible(true);
		setLayout(new FlowLayout());
		
		button = new JButton("클릭");
		add(button);
		// 무명(익명) 클래스로 이벤트 처리기를 작성, 클래스 정의 + 객체 생성 동시 작성
		button.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				// getSource() 이벤트를 발생시킨 객체를 식별, Object 반환, 타입 변환
				if(e.getSource() == button)
					button.setText("마침내 버튼이 눌러졌습니다");
			}			
		});
		
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		
	}
}
public class ex05 {
	public static void main(String[] args) {
		MyFrame05 frame05 = new MyFrame05();
	}
}

06. 색 랜덤으로 Color RGB 주기!

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

class MyFrame06 extends JFrame {
	JButton button;
	JPanel panel;
	public MyFrame06() {
		setTitle("rgb");
		setSize(300, 250);
		setVisible(true);
		setLayout(new FlowLayout());
		button = new JButton("클릭");
		panel = new JPanel();
		panel.setSize(100, 100);
		
		add(button);
		add(panel);
		
		button.addMouseListener(new MyListner2());
	}
	
	class MyListner2 extends MouseAdapter {

		@Override
		public void mouseClicked(MouseEvent e) {
			int r = (int)(Math.random() * 256);
			int g = (int)(Math.random() * 256);
			int b = (int)(Math.random() * 256);
			if(e.getClickCount() == 2) {
				panel.setBackground(new Color(r,g,b));
			}
		}
		
	}
}

public class ex06 {
	public static void main(String[] args) {
		MyFrame06 frame06 = new MyFrame06();
	}
}

07. 버튼 액션 이벤트 가위 바위 보 게임 만들기

import java.awt.*;
import java.awt.event.*;
import java.util.Scanner;

import javax.swing.*;

class MyFrame07 extends JFrame {
	JButton rockBtn, scissorsBtn, paperBtn;
	JPanel btnPanel, enemyPanel, resultPanel;
	JLabel enemyLabel, resultLabel;
	
	public MyFrame07() {
		setTitle("가위바위보");
		setSize(600, 400);
		setVisible(true);
		
		enemyLabel = new JLabel("상대방",JLabel.CENTER);
		// textField는 가운데 정렬이 없기때문에 .setHorizontalAlignment(0);
		resultLabel = new JLabel("결과");
		
		btnPanel = new JPanel(new GridLayout(0, 3));
		enemyPanel = new JPanel();
		enemyPanel.setBackground(Color.WHITE);
		resultPanel = new JPanel();
		resultPanel.setBackground(Color.WHITE);
		
		rockBtn = new JButton();
		scissorsBtn = new JButton();
		paperBtn = new JButton();
		rockBtn.addActionListener(new GameEvent());
		scissorsBtn.addActionListener(new GameEvent());
		paperBtn.addActionListener(new GameEvent());
		rockBtn.setBackground(Color.WHITE);
		scissorsBtn.setBackground(Color.WHITE);
		paperBtn.setBackground(Color.WHITE);
		
		rockBtn.setIcon(new ImageIcon("D:/mms/2021-03-03/src/바위.jpg"));
		scissorsBtn.setIcon(new ImageIcon("D:/mms/2021-03-03/src/가위.jpg"));
		paperBtn.setIcon(new ImageIcon("D:/mms/2021-03-03/src/보자기.jpg"));
		
		btnPanel.add(rockBtn);
		btnPanel.add(scissorsBtn);
		btnPanel.add(paperBtn);
		
		enemyPanel.add(enemyLabel);
		resultPanel.add(resultLabel);
		
		add(BorderLayout.NORTH, enemyPanel);
		add(BorderLayout.CENTER, btnPanel);
		add(BorderLayout.SOUTH, resultPanel);
	}
	
	class GameEvent implements ActionListener {
		private void enemyResult(int num) {
			switch (num) {
			case 0:
				enemyLabel.setText("바위");
				break;
			case 1:
				enemyLabel.setText("가위");
				break;
			case 2:
				enemyLabel.setText("보");
				break;
			default:
				break;
			}
		}
		
		private void gameResult(int num, String player) {
			switch (player) {
			case "Rock":
				if(num == 0) setResult(2);
				else if(num == 1) setResult(1);
				else setResult(3);
				break;
			case "Scissor":
				if(num == 0) setResult(3);
				else if(num == 1)setResult(2);
				else setResult(1);
				break;
			default:
				if(num == 0) setResult(1);
				else if(num == 1)setResult(3);
				else setResult(2);
			}
		}
		
		private void setResult (int num) {
			switch (num) {
			case 1:
				resultLabel.setText("이겼습니다");
				resultPanel.setBackground(Color.GREEN);
				resultLabel.setForeground(Color.WHITE);
				break;
			case 2:
				resultLabel.setText("비겼습니다");
				resultPanel.setBackground(Color.ORANGE);
				resultLabel.setForeground(Color.WHITE);
				break;
			default:
				resultLabel.setText("졌습니다");
				resultPanel.setBackground(Color.RED);
				resultLabel.setForeground(Color.WHITE);
			}
		}
		@Override
		public void actionPerformed(ActionEvent e) {
			int num = (int)(Math.random()*3);
			enemyResult(num);
			gameResult(num, e.getActionCommand());
		}
		
	}
}


public class ex07 {
	public static void main(String[] args) {
		MyFrame07 frame07 = new MyFrame07();
		Scanner scanner = new Scanner(System.in);
	}
}

08. 마우스 이벤트 엔터 이벤트

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

class MyFrame08 extends JFrame {
	JButton button;
	
	public MyFrame08() {
		setSize(300, 200);
		setTitle("마우스엔터익사잇이벤트");
		setLayout(new FlowLayout());
		setVisible(true);
		
		button = new JButton("엔터");
		button.setBackground(Color.YELLOW);
		button.addMouseListener(new mouseEvent());
		
		add(button);
	}
	
	class mouseEvent implements MouseListener {

		@Override
		public void mouseClicked(MouseEvent e) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void mouseEntered(MouseEvent e) {
			button.setBackground(Color.RED);
			button.setForeground(Color.WHITE);
		}

		@Override
		public void mouseExited(MouseEvent e) {
			button.setBackground(Color.YELLOW);
			button.setForeground(Color.BLACK);
			
		}

		@Override
		public void mousePressed(MouseEvent e) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void mouseReleased(MouseEvent e) {
			// TODO Auto-generated method stub
			
		}
		
	}
}


public class ex08 {
	public static void main(String[] args) {
		MyFrame08 frame08 = new MyFrame08();
	}
}