20220728

}

import java.awt.*;

import javax.swing.*;

import java.util.*;

class Main extends JFrame{

Main(){

setVisible(true);

setSize(700,700);

Container c = getContentPane();

c.setLayout(new BorderLayout());

JPanel p1 = new JPanel();

p1.setBackground(Color.WHITE);

p1.setLayout(null);

c.add(p1,BorderLayout.CENTER);

JPanel p2 = new JPanel();

p2.setBackground(Color.GRAY);

c.add(p2,BorderLayout.NORTH);

JButton b = new JButton("열기");

JButton b1 = new JButton("닫기");

JButton b2 = new JButton("나가기");

p2.add(b);

p2.add(b1);

p2.add(b2);

JPanel p3 = new JPanel();

p3.setBackground(Color.YELLOW);

c.add(p3,BorderLayout.SOUTH);

JButton b3 = new JButton("Word input");

p3.add(b3);

JTextField jt = new JTextField(10);

p3.add(jt);

for(int i=1;i<=10;i++) {

JLabel la = new JLabel("*-*");

p1.add(la);

la.setSize(15, 15);

int x = (int)(Math.random()*200)+50;

int y = (int)(Math.random()*200)+50;

la.setLocation(x, y);

la.setForeground(Color.RED);

}

}

public static void main(String[] args) {

new Main();

}

}

*/

/*

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

import java.util.*;

class Main extends JFrame{

Container c = getContentPane();

Main(){

setVisible(true);

setSize(700,700);

c.setLayout(null);

JButton b3 = new JButton("클릭하세요!");

b3.setSize(100, 50);

b3.setLocation(300, 100);

b3.addActionListener(new MyActionListener()); //액션리스너를 붙여줘!

c.add(b3);

}

class MyActionListener implements ActionListener{

int count=0;

public void actionPerformed(ActionEvent e) {

if(count==10) {

c.removeAll();

c.repaint();

}

else

{

count++;

JLabel la = new JLabel("new label!!");

la.setSize(100, 100);

int x = (int)(Math.random()*600)+50;

int y = (int)(Math.random()*600)+50;

la.setLocation(x, y);

c.add(la);

c.repaint(); //다시그리기

}

//e : 이벤트에 대한 정보를 담고있는 객체 ( 이벤트가 어디서 일어났는지?(소스), 일어난 시간?, 일어난 위치)

// JButton b = (JButton)e.getSource();

// if(b.getText().equals("클릭되었음!!"))

// b.setText("클릭 안 됨!");

// else

// b.setText("클릭되었음!!");

}

}

public static void main(String[] args) {

new Main();

}

}

*/

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.*;

import java.util.*;

class Main extends JFrame{

//이벤트 리스너랑 같ㅇ이 쓸 컴포넌트는 여기에다가!!

JPanel p1= new JPanel();

Main(){

Container c = getContentPane();

setVisible(true);

setSize(700,700);

c.setLayout(new BorderLayout());

JPanel p = new JPanel();

c.add(p,BorderLayout.NORTH);

JButton b = new JButton("추가 버튼 ");

b.addActionListener(new Action()); //리스너 버튼에 붙여주기

JButton b1 = new JButton("전부 삭제");

p.add(b);

p.add(b1);

c.add(p1,BorderLayout.CENTER);

p1.setLayout(null);

}

class Action implements ActionListener{

public void actionPerformed(ActionEvent e) {

JLabel la = new JLabel("*-*");

la.setSize(100, 100);

int x = (int)(Math.random()*600)+50;

int y = (int)(Math.random()*600)+50;

la.setLocation(x, y);

p1.add(la);

p1.repaint();

}

}

public static void main(String[] args) {

new Main();

}

}