package swing.frame; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; public class Calculator extends JFrame { public Calculator(String title) { //this없어도됨 //title설정 setTitle(title); //size설정(width,height) setSize(230, 400);..