[6주차] GUI 실습

객체지향프로그래밍 9장 GUI 실습

실습문제 1번 swing 패키지 JFrame 상속

import javax.swing.*;
public class MyApp extends JFrame{
    public MyApp(){
        setTitle("Let's study Java");
        setSize(400,200);
        setVisible(true);
    }
}
class ttt{
    public static void main(String[] args) {
        MyApp f = new MyApp();
    }
}

실습문제 2번 awt 패키지 JButton 활용

import javax.swing.*;
import java.awt.*;
class App extends JFrame{
    public App(){
        setTitle("BorderLayout Practice");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        setLayout(new BorderLayout(5,7));
        
        add(new JButton("Center"), BorderLayout.CENTER);
        add(new JButton("North"), BorderLayout.NORTH);
        add(new JButton("South"), BorderLayout.SOUTH);
        add(new JButton("East"), BorderLayout.EAST);
        add(new JButton("West"), BorderLayout.WEST);
    
        setSize(400,200);
        setVisible(true);
    }
}
public class Bordor{
    public static void main(String[] args) {
        App f = new App();
        
    }
}

실습문제 3번 awt와 스윙(swing)

import javax.swing.*;
import java.awt.*;
class App extends JFrame{
    public App(){
        setTitle("Ten Buttons Frame");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        
        setLayout(new GridLayout(1,10,5,5));
        
        add(new JButton("0"));
        add(new JButton("1"));
        add(new JButton("2"));
        add(new JButton("3"));
        add(new JButton("4"));
        add(new JButton("5"));
        add(new JButton("6"));
        add(new JButton("7"));
        add(new JButton("8"));
        add(new JButton("9"));
        
        setSize(400,200);
        setVisible(true);
    }
}
public class Grid{
    public static void main(String[] args) {
        App f = new App();
        
    }
}

실습문제 4번 컴포넌트 활용

import javax.swing.*;
import java.awt.*;
class App extends JFrame{
    public App(){
        setTitle("Ten Buttons Frame");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        setLayout(new GridLayout(1,10,5,5));    
//        Container contentPane = getContentPane();
//        contentPane.setBackground(Color.red);
        
        Component cmp;
        
        cmp = add(new JButton("0"));
        cmp.setBackground(Color.red);
        cmp = add(new JButton("1"));
        cmp.setBackground(Color.orange);
        cmp = add(new JButton("2"));
        cmp.setBackground(Color.YELLOW);
        cmp = add(new JButton("3"));
        cmp.setBackground(Color.green);
        cmp = add(new JButton("4"));
        cmp.setBackground(Color.blue);
        cmp = add(new JButton("5"));
        cmp.setBackground(Color.cyan);
        cmp = add(new JButton("6"));
        cmp.setBackground(Color.LIGHT_GRAY);
        cmp= add(new JButton("7"));
        cmp.setBackground(Color.pink);
        cmp = add(new JButton("8"));
        cmp.setBackground(Color.DARK_GRAY);
        cmp = add(new JButton("9"));
        cmp.setBackground(Color.magenta);
        
        setSize(400,200);
        setVisible(true);
    }
}
public class Grid2{
    public static void main(String[] args) {
        App f = new App();
        
    }
}

실습문제 5번 4x4 Color Frame 구현

import javax.swing.*;
import java.awt.*;
 
public class Lay extends JFrame{
    Lay(){
        setTitle("4x4 Color Frame");
        setSize(500, 300);
        setLayout(new GridLayout(4,4));
        
        JLabel l[] = {new JLabel("0"),new JLabel("1"),new JLabel("2"),
                new JLabel("3"),new JLabel("4"),new JLabel("5"),
                new JLabel("6"),new JLabel("7"),new JLabel("8"),
                new JLabel("9"),new JLabel("10"),new JLabel("11"),
                new JLabel("12"),new JLabel("13"),new JLabel("14"),
                new JLabel("15"),};
        
        l[0].setBackground(Color.red);
        l[1].setBackground(Color.orange);
        l[2].setBackground(Color.yellow);
        l[3].setBackground(Color.green);
        l[4].setBackground(Color.cyan);
        l[5].setBackground(Color.blue);
        l[6].setBackground(Color.magenta);
        l[7].setBackground(Color.LIGHT_GRAY);
        l[8].setBackground(Color.pink);
        l[9].setBackground(Color.gray);
        l[10].setBackground(Color.white);
        l[11].setBackground(Color.DARK_GRAY);
        l[12].setBackground(Color.black);
        l[13].setBackground(Color.orange);
        l[14].setBackground(Color.blue);
        l[15].setBackground(Color.magenta);
 
        for(int i =0; i<16; i++){
            l[i].setOpaque(true);
            add(l[i]);    // Fram에 만든 Label을 붙임
        }
        
        setVisible(true);
    }
    
    public static void main(String[] args) {
        new Lay();
    }
}

실습문제 6번 Random Labels 구현

import javax.swing.*;
 
import java.awt.*;
public class BorderLayoutEx extends JFrame{
    BorderLayoutEx(){
        setTitle("Random Labels");
        setSize(300, 300);
                
        setLayout(null);    // Layout 초기화
        
        for (int i = 0; i<20; i++){
        JLabel l = new JLabel();
    
        int x=(int)(Math.random()*200)+50;
        int y=(int)(Math.random()*200)+50;
        l.setLocation(x, y);
        l.setSize(10, 10);
        l.setBackground(Color.blue);
        l.setOpaque(true);    // 색상  보여주기
        
        add(l);
        }
 
        setVisible(true);        // 프레임 보여주기
    }
    public static void main(String[] args) {
        new BorderLayoutEx();
    }
}