Learning/JAVA
CalTest 클래스를 복사하여 내부 클래스로 나타내기 (CalTest2)
cozy coding
2020. 6. 26. 14:41
- CalTest 클래스를 복사하여 내부 클래스로 나타내기 (CalTest2) (Anonymous Inner Type 연습. 중복된 코드는 많으나 객체와 이벤트를 붙임으로써 명료해진다.)
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package swingTest;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class CalTest2 extends JFrame {
private JTextField tf1, tf2, tf3;
public CalTest2() {
setTitle("계산기2");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new FlowLayout());
tf1=new JTextField(5); //숫자 1
tf2=new JTextField(5); //숫자 2
tf3=new JTextField(20); //결과
JButton b1=new JButton("+");
JButton b2=new JButton("-");
JButton b3=new JButton("*");
JButton b4=new JButton("/");
b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int a= Integer.parseInt(tf1.getText());
int b= Integer.parseInt(tf2.getText());
tf3.setText(a+b+"");
}
});
b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int a= Integer.parseInt(tf1.getText());
int b= Integer.parseInt(tf2.getText());
tf3.setText(a-b+"");
}
});
b3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int a= Integer.parseInt(tf1.getText());
int b= Integer.parseInt(tf2.getText());
tf3.setText(a*b+"");
}
});
b4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int a= Integer.parseInt(tf1.getText());
int b= Integer.parseInt(tf2.getText());
tf3.setText(a/b+"");
}
});
add(new JLabel("숫자1"));
add(tf1);
add(new JLabel("숫자2"));
add(tf2);
add(b1); add(b2); add(b3); add(b4);
add(new JLabel("결과"));
add(tf3);
setSize(700,100);
setVisible(true);
}
public static void main(String[] args) {
new CalTest2();
}
}
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