Java swing, awt 기본적인 GUI2

실행결과

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class Problem_Swing {

public static void main(String[] args) {
new Frame();
}

}

class Frame extends JFrame implements ActionListener {
JLabel name;
JTextField name_t;
JCheckBox ch1,ch2,ch3,ch4;
JTextArea area;
JButton input,print;
ArrayList<Mydata> mydatas = new ArrayList<>();
public Frame() {
super("문제");
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
this.setBounds(200, 200, 250, 450);
this.setLayout(new FlowLayout());

JPanel jp1 = new JPanel();
JPanel jp2 = new JPanel();
JPanel jp3 = new JPanel();
JPanel jp4 = new JPanel();

name = new JLabel("이름");
name_t = new JTextField(10);
ch1 = new JCheckBox("운동");
ch2 = new JCheckBox("음악");
ch3 = new JCheckBox("독서");
ch4 = new JCheckBox("게임");
area = new JTextArea(10, 20);
input = new JButton("입력");
print = new JButton("전체 출력");
input.addActionListener(this);
print.addActionListener(this);
jp1.setLayout(new FlowLayout());
jp2.setLayout(new FlowLayout());
jp3.setLayout(new FlowLayout());
jp4.setLayout(new FlowLayout());

jp1.add(name);
jp1.add(name_t);
jp2.add(ch1);
jp2.add(ch2);
jp2.add(ch3);
jp2.add(ch4);
jp3.add(area);
jp4.add(input);
jp4.add(print);


this.add(jp1);
this.add(jp2);
this.add(jp3);
this.add(jp4);
this.setVisible(true);

}

@Override
public void actionPerformed(ActionEvent e) {
String name="";
String str="";
String print_t="";
if(e.getSource()==input){
name = name_t.getText();
name_t.setText("");
if(ch1.isSelected()){
str += ch1.getText()+"\n";
ch1.setSelected(false);
}
if(ch2.isSelected()){
str += ch2.getText()+"\n";
ch2.setSelected(false);
}
if(ch3.isSelected()){
str += ch3.getText()+"\n";
ch3.setSelected(false);
}
if(ch4.isSelected()){
str += ch4.getText()+"\n";
ch4.setSelected(false);
}
Mydata d = new Mydata(name,str);
mydatas.add(d);
}
if(e.getSource()==print){
for(int i=0;i<mydatas.size();i++){
print_t += "이름 : "+mydatas.get(i).name+"\n";
print_t += "취미 : "+mydatas.get(i).hobby+"\n";
area.setText(print_t);
}

}

}

}
class Mydata {
String name="";
String hobby="";

public Mydata(String name, String hobby){
this.name = name;
this.hobby = hobby;
}
public void setHobby(String h){
this.hobby += h;
}
}