GUI

public class JavaExam {
	public static void main(String[] args) {
		new P07_ComboBox();
	}
}

class P07_ComboBox extends JFrame{
	public P07_ComboBox() {
		run();
	}

	private void run() {
		
		JPanel panel = new JPanel();
		String[] items = new String[] {"빨강","주황","노랑","초록","파랑","남색","보라"};
		JComboBox<String> combo = new JComboBox<>(items);
		combo.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JComboBox<String> cb = (JComboBox<String>)e.getSource();
				int index = cb.getSelectedIndex();
				JOptionPane.showMessageDialog(null, ""+items[index]+":"+index);
			}
		});

		panel.add(combo);
		add(panel);		
		setLayout(new FlowLayout());
		setTitle("P07 ComboBox");
		setBounds(700, 300, 300, 300);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

 

class P06_List extends JFrame implements ListSelectionListener {
	public P06_List() {
		run();
	}

	private void run() {
		JPanel jPanel = new JPanel();
		String[] hobbies = new String[] {"잠자기","먹기","유튜브","넷플릭스","게임"};
		JList<String> list = new JList<String>(hobbies);
		list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		
		list.addListSelectionListener(this);
		jPanel.add(list);

		add(jPanel);
		setBounds(700, 300, 300, 300);
		setTitle("P06 List");
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	@Override
	public void valueChanged(ListSelectionEvent e) {
		JList list = (JList)e.getSource();
		if(!e.getValueIsAdjusting())
			System.out.println(list.getSelectedValue());
	}
}

public class JavaExam {
	public static void main(String[] args) {
		new P06_List();
	}
}

class P06_List extends JFrame{
	public P06_List() {
		run();
	}

	private void run() {
		JPanel jPanel = new JPanel();
		String[] hobbies = new String[] {"잠자기","먹기","유튜브","넷플릭스","게임"};
		JList<String> list = new JList<String>(hobbies);
		
		jPanel.add(list);

		add(jPanel);
		setBounds(700, 300, 300, 300);
		setTitle("P06 List");
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

public class JavaExam {
	public static void main(String[] args) {
		new P05_Radio();
	}
}

class P05_Radio extends JFrame{
	JRadioButton radio1,radio2,radio3;
	
	public P05_Radio() {
		run();
	}
	private void run() {
		JPanel jPanel = new JPanel();
		
		//라디오 버튼 생성(컴포넌트) 생성
		radio1 = new JRadioButton("게임",true);
		radio1.addItemListener(new MyItemListener());
		radio2 = new JRadioButton("넷플릭스");
		radio2.addItemListener(new MyItemListener());
		radio3 = new JRadioButton("유튜브");
		radio3.addItemListener(new MyItemListener());

		
		//라디오 버튼은 버튼 그룹에 묶여 있어야 함
		ButtonGroup buttonGroup = new ButtonGroup();
		buttonGroup.add(radio1);
		buttonGroup.add(radio2);
		buttonGroup.add(radio3);
		
		// 라디오 버튼을 패널에 붙임
		jPanel.add(radio1);
		jPanel.add(radio2);
		jPanel.add(radio3);
		
		add(jPanel);
		setTitle("P05 Radio");
		setBounds(700,300,300,300);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

class MyItemListener implements ItemListener{
	@Override
	public void itemStateChanged(ItemEvent e) {
		if(e.getStateChange() == ItemEvent.DESELECTED) {
			return;
		}
		JRadioButton rbtn = (JRadioButton)e.getSource();
		if(rbtn.getText().equals("게임"))
			JOptionPane.showMessageDialog(null, ""+rbtn.getText());
		if(rbtn.getText().equals("넷플릭스"))
			JOptionPane.showMessageDialog(null, ""+rbtn.getText());
		if(rbtn.getText().equals("유튜브"))
			JOptionPane.showMessageDialog(null, ""+rbtn.getText());
	}
}

public class JavaExam {
	public static void main(String[] args) {
		new P05_Radio();
	}
}

class P05_Radio extends JFrame{
	JRadioButton radio1,radio2,radio3;
	
	public P05_Radio() {
		run();
	}
	private void run() {
		JPanel jPanel = new JPanel();
		
		//라디오 버튼 생성(컴포넌트) 생성
		radio1 = new JRadioButton("게임",true);
		radio2 = new JRadioButton("넷플릭스");
		radio3 = new JRadioButton("유튜브");

		
		//라디오 버튼은 버튼 그룹에 묶여 있어야 함
		ButtonGroup buttonGroup = new ButtonGroup();
		buttonGroup.add(radio1);
		buttonGroup.add(radio2);
		buttonGroup.add(radio3);
		
		// 라디오 버튼을 패널에 붙임
		jPanel.add(radio1);
		jPanel.add(radio2);
		jPanel.add(radio3);
		
		add(jPanel);
		setTitle("P05 Radio");
		setBounds(700,300,300,300);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class JavaExam {
	public static void main(String[] args) {
		new P04_CheckBox2();
	}
}

class P04_CheckBox2 extends JFrame{
	JLabel label;
	JCheckBox check1, check2, check3;
	JButton button;
	public P04_CheckBox2() {
		run();
	}
	private void run() {
		label = new JLabel("<html><body text='red'><h1>주문할 상품을 선택하세요</h1></html>");
		label.setBounds(50, 50, 300, 30);
		
		check1 = new JCheckBox("버거킹 와퍼 Set 7900원");
		check1.setBounds(100,100,220,20);
		check2 = new JCheckBox("맥도날드 빅맥 Set 5500원");
		check2.setBounds(100,150,220,20);
		check3 = new JCheckBox("맘스터치 싸이버거 Set 6700원");
		check3.setBounds(100,200,220,20);
		
		button = new JButton("주문");
		button.setBounds(100, 300, 200, 30);
		button.addActionListener(new ActionListener() {
			private String whatselected(String str) {
				if(check1.isSelected()) str += check1.getText()+"\n";
				if(check2.isSelected()) str += check2.getText()+"\n";
				if(check3.isSelected()) str += check3.getText()+"\n";
				return str;
			}
			private int whatselected() {
				int total_price = 0;
				if(check1.isSelected()) total_price +=7900; 
				if(check2.isSelected()) total_price +=5500;
				if(check3.isSelected()) total_price +=6700;
				return total_price;
			}
			
			public void actionPerformed(ActionEvent e) {
				String str="";
				str = whatselected(str);
				int price = whatselected(); 
				str += "----------------------------------\n";
				JOptionPane.showMessageDialog(null, str+"합계: "+price+"원");
			}
		});
		
		add(label);
		add(check1);add(check2); add(check3);
		add(button);
		setTitle("햄버거 키오스크");
		setBounds(700,300,400,400);
		setLayout(null);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class JavaExam {
	public static void main(String[] args) {
		new P03_CheckBox();
	}
}

class P03_CheckBox extends JFrame{
	public P03_CheckBox() {
		run();
	}

	private void run() {
		// 패널(컨테이너) 생성
		JPanel jpanel = new JPanel();
		
		// 체크박스 생성
		JCheckBox checkBox1 = new JCheckBox("등산"); //체크된 상태로
		JCheckBox checkBox2 = new JCheckBox("수영");
		JCheckBox checkBox3 = new JCheckBox("낚시");
		JCheckBox checkBox4 = new JCheckBox("공연관람");
		JCheckBox checkBox5 = new JCheckBox("영화보기");
		
		JButton button = new JButton("확인");
		button.addActionListener(new ActionListener() {
			private String whatselected(String str) {
				if(checkBox1.isSelected())str += checkBox1.getText()+" ";
				if(checkBox2.isSelected())str += checkBox2.getText()+" ";
				if(checkBox3.isSelected())str += checkBox3.getText()+" ";
				if(checkBox4.isSelected())str += checkBox4.getText()+" ";
				if(checkBox5.isSelected())str += checkBox5.getText()+" ";
				return str;
			}
			public void actionPerformed(ActionEvent e) {
				String str = "";
				str = whatselected(str);
				JOptionPane.showMessageDialog(null, str);
			}
		});
		
		// 체크박스를 패널(컨테이너)에 붙이기
		jpanel.add(checkBox1);
		jpanel.add(checkBox2);
		jpanel.add(checkBox3);
		jpanel.add(checkBox4);
		jpanel.add(checkBox5);
		jpanel.add(button);
		
		add(jpanel);
		setTitle("예제3-체크박스");
		setBounds(100, 100, 350, 300);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class JavaExam {
	public static void main(String[] args) {
		new P03_CheckBox();
	}
}

class P03_CheckBox extends JFrame{
	public P03_CheckBox() {
		run();
	}

	private void run() {
		// 패널(컨테이너) 생성
		JPanel jpanel = new JPanel();
		
		// 체크박스 생성
		JCheckBox checkBox1 = new JCheckBox("등산"); //체크된 상태로
		checkBox1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if (checkBox1.isSelected()) {
					System.out.println("등산선택");
					JOptionPane.showMessageDialog(null,"등산 선택됨");
				}
				else {
					System.out.println("등산해제");
					JOptionPane.showMessageDialog(null,"등산 해제");
				}
			}
		});		
		JCheckBox checkBox2 = new JCheckBox("수영");
		JCheckBox checkBox3 = new JCheckBox("낚시");
		JCheckBox checkBox4 = new JCheckBox("공연관람");
		JCheckBox checkBox5 = new JCheckBox("영화보기");
		JButton button = new JButton("확인");
		
		// 체크박스를 패널(컨테이너)에 붙이기
		jpanel.add(checkBox1);
		jpanel.add(checkBox2);
		jpanel.add(checkBox3);
		jpanel.add(checkBox4);
		jpanel.add(checkBox5);
		jpanel.add(button);
		
		add(jpanel);
		setTitle("예제3-체크박스");
		setBounds(100, 100, 350, 300);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
}

 

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

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class JavaExam {
	public static void main(String[] args) {
		new P02_Button();
	}
}
class P02_Button{  // JFrame을 상속받지 않은 예제
	public P02_Button() {
		run();
	}
	private void run() {
		JFrame jFrame = new JFrame();
		JPanel panel = new JPanel();
		
		// 버튼 컴포넌트를 생성
		JButton button1 = new JButton("버튼 1");
		button1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog(null, "버튼 1클릭");
			}
		});
		JButton button2 = new JButton("버튼 2");
		button2.addActionListener(e -> {
			JOptionPane.showMessageDialog(null, "버튼 2클릭");			
		});
		JButton button3 = new JButton("버튼 3");
		button3.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog(null, "버튼 3클릭");
			}
		});
		
		// 버튼 컴포넌트를 패널(컨테이너)에 붙이기
		panel.add(button1);
		panel.add(button2);
		panel.add(button3);
		
		// 패널을 프레임에 붙이기
		jFrame.add(panel);
		jFrame.setTitle("예제2-버튼");
		jFrame.setBounds(100, 100, 400, 300);
		jFrame.setVisible(true);
		jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

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

public class JavaExam {
	public static void main(String[] args) {
		new P02_Button();
	}
}
class P02_Button{  // JFrame을 상속받지 않은 예제
	public P02_Button() {
		run();
	}
	private void run() {
		JFrame jFrame = new JFrame();
		JPanel panel = new JPanel();
		
		// 버튼 컴포넌트를 생성
		JButton button1 = new JButton("버튼 1");
		JButton button2 = new JButton("버튼 2");
		JButton button3 = new JButton("버튼 3");
		
		// 버튼 컴포넌트를 패널(컨테이너)에 붙이기
		panel.add(button1);
		panel.add(button2);
		panel.add(button3);
		
		// 패널을 프레임에 붙이기
		jFrame.add(panel);
		jFrame.setTitle("예제2-버튼");
		jFrame.setBounds(100, 100, 400, 300);
		jFrame.setVisible(true);
		jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

import javax.swing.JFrame;

public class JavaExam {
	public static void main(String[] args) {
		new P01_Frame();
	}
}

class P01_Frame extends JFrame{
	public P01_Frame() {
		run();
	}
	private void run() {
		setTitle("예제1");
//		setLocation(100, 100);
//		setSize(300, 200);
		setBounds(100, 100, 400, 300);
		setVisible(true);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}