210823_swing(버튼)

배경색 변경

(예제1)

public class SwingBtnEvent_05 extends JFrame{

 

Container cp;

JButton btn1,btn2;

 

public SwingBtnEvent_05(String title) {  

super(title);

 

cp=this.getContentPane();

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setBounds(200,300,400,500);

cp.setBackground(new Color(155,155,200));

 

setDesign();

this.setVisible(true);  

}

 

//디자인과 액션이벤트

public void setDesign() {

 

this.setLayout(new FlowLayout());

 

//버튼생성하고 바로 이벤트(익명내부클래스 이용)

btn1=new JButton("배경색변경_핫핑크");

//this에 올리기 위해 프레임에 추가

this.add(btn1);

//이벤트

btn1.addActionListener(new ActionListener() {

 

@Override

public void actionPerformed(ActionEvent e) {

//배경색 변경

cp.setBackground(Color.MAGENTA);

}

});

 

btn2=new JButton("배경색변경_블루");

this.add(btn2);

btn2.addActionListener(new ActionListener() {

 

@Override

public void actionPerformed(ActionEvent e) {

cp.setBackground(Color.BLUE);

}

}); 

}

 

public static void main(String[] args) {

 

new SwingBtnEvent_05("버튼이벤트를 익명내부클래스로");

}

}

 

 

 

~~~~~~~~~~~~~~~~~~~~

 

 

버튼 누르면 팝업창

 

public class SwingBtnEvent_06 extends JFrame implements ActionListener {

 

Container cp;

JButton btn1,btn2;

 

public SwingBtnEvent_06(String title) {  

super(title);

 

cp=this.getContentPane();

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setBounds(200,300,400,500);

cp.setBackground(new Color(155,155,200));

 

initDesign();

this.setVisible(true);

}

 

 

 public void initDesign() {

 

this.setLayout(new FlowLayout());

btn1=new JButton("<<");

btn2=new JButton(">>");

 

this.add(btn1);

this.add(btn2);

 

btn1.addActionListener(this);

btn2.addActionListener(this);

 }

 

 

public static void main(String[] args) {

 

new SwingBtnEvent_06("이벤트버튼 #06");

}

 

@Override

public void actionPerformed(ActionEvent e) {

 

Object ob=e.getSource();

 

if(ob==btn1)

JOptionPane.showMessageDialog(this, "왼쪽 클릭"); 

else if(ob==btn2)

JOptionPane.showMessageDialog(this, "오른쪽 클릭"); 

}

}