简易计算器-2.docVIP

简易计算器-2 import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.border.BevelBorder; import javax.swing.border.Border; public class SwingCalculator implements ActionListener{ public JButton makeButton(String label, Color color, Font font) { JButton b = new JButton(label); //b.setBackground(color); b.setFont(font); return b; } public JPanel makePanel(LayoutManager lm, Color c) { JPanel p = new JPanel(); p.setLayout(lm); //p.setBackground(c); return p; } public void init() {//初始化GUI frame = new JFrame(MyCalculator); valueField = new JTextField(50); p1 = makePanel(new GridLayout(0,3,4,4),Color.lightGray); p2 = makePanel(new BorderLayout(6,2),Color.lightGray); p3 = makePanel(new BorderLayout(4,10),Color.lightGray); leftPanel = makePanel(new GridLayout(5,0,4,4),Color.lightGray); border = BorderFactory.createBevelBorder(BevelBorder.LOWERED); jlabel = new JLabel();//MC上方方框 jlabel.setHorizontalAlignment(JLabel.CENTER); jlabel.setBorder(border); mc = makeButton(MC,colorBlue,f);//MC mc.setForeground(Color.RED); mc.addActionListener(this); mr = makeButton(MR,colorBlue,f);//MR mr.addActionListener(this); mr.setForeground(Color.RED); ms = makeButton(MS,colorBlue,f);//MS ms.addActionListener(this); ms.setForeground(Color.RED); ma = makeButton(M+,colorBlue,f);//M+ ma.setForeground(Color.RED); ma.addActionListener(this); bs = makeButton(BackSpace,colorBlue,f);//BackSpace bs.addActionListener(this); ce = makeButton(CE,colorBlue,f);//CE ce.addActionListener(this);