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빈 패널로 시작하는 프로그램이 있고 그 다음에 버튼을 누르면 그 패널은 요소가 포함 된 다른 패널로 채워집니다.패널을 지우려면 어떻게해야합니까?
그러나 버튼을 다시 누르면 겹쳐서 무언가가 매우 거칠어집니다.
단추를 누를 때마다 패널을 지워서 겹치지 않게하려면 어떻게합니까? removeAll()UpdateUI()을 사용했으나 아무 것도 작동하지 않았다는 것에 유의하십시오. 참여하는 패널의 일부를 살펴 취함으로써
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.ComponentOrientation;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class Calculator extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
JPanel NumberPanel = new JPanel();
String[] ButtonString = {"7", "8", "9", "4", "5", "6", "1", "2", "3", "0", ".", "+/-"};
JButton ButtonArray[] = new JButton[ButtonString.length];
JPanel OperationPanel = new JPanel();
String[] OperationString = {"Erase", "Ac", "*", "/", "+", "-", "Ans", "="};
JButton[] OperationArray = new JButton[OperationString.length];
JTextField WritingZone = new JTextField(27);
JButton b1 = new JButton("Ok");
JButton b2 = new JButton("Exit");
double first = 0;
double second = 0;
double result = 0;
char operation = ' ';
Calculator() {
super("Project Wolverine");
setLayout(new BorderLayout(5, 5));
JPanel radio1 = new JPanel();
final JRadioButton r1 = new JRadioButton("Simple Calculator");
final JRadioButton r2 = new JRadioButton("Advanced Calculator");
ButtonGroup g1 = new ButtonGroup();
g1.add(r1);
g1.add(r2);
radio1.setLayout(new GridLayout(3, 1, 5, 5));
radio1.add(r1);
radio1.add(r2);
radio1.setBorder(BorderFactory.createTitledBorder("Choose a calculator"));
JPanel panel2 = new JPanel();
panel2.setLayout(new GridLayout(1, 2, 5, 5));
panel2.add(b1);
panel2.add(b2);
radio1.add(panel2);
add(BorderLayout.WEST, radio1);
final JPanel emptyPanel = new JPanel();
emptyPanel.setVisible(false);
emptyPanel.setLayout(new FlowLayout());
add(BorderLayout.EAST, emptyPanel);
b1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
emptyPanel.removeAll();
if (e.getSource() == b1) {
if (r1.isSelected()) {
for (int a = 0; a < ButtonArray.length; a++) {
ButtonArray[a] = new JButton(ButtonString[a]);
}
NumberPanel.setLayout(new GridLayout(4, 3, 5, 5));
for (int a = 0; a < ButtonArray.length; a++) {
NumberPanel.add(ButtonArray[a]);
}
for (int a = 0; a < OperationArray.length; a++) {
OperationArray[a] = new JButton(OperationString[a]);
}
OperationPanel.setLayout(new GridLayout(4, 2, 5, 5));
for (int a = 0; a < OperationArray.length; a++) {
OperationPanel.add(OperationArray[a]);
}
JPanel Finalpanel = new JPanel();
Finalpanel.setLayout(new FlowLayout());
Finalpanel.add(NumberPanel);
Finalpanel.add(OperationPanel);
WritingZone.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
WritingZone.setBorder(BorderFactory.createLoweredSoftBevelBorder());
WritingZone.setEditable(false);
WritingZone.setBackground(Color.white);
JPanel TextPanel = new JPanel();
TextPanel.add(WritingZone);
for (int a = 0; a < ButtonArray.length; a++) {
ButtonArray[a].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int a = 0; a < ButtonArray.length - 1; a++) {
if (e.getSource() == ButtonArray[a]) {
String temp = WritingZone.getText();
WritingZone.setText(temp + ButtonArray[a].getText());
}
}
}
});
}
ButtonArray[11].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == ButtonArray[11]) {
StringBuilder temp = new StringBuilder();
temp.append(WritingZone.getText());
WritingZone.setText("");
for (int a = 0; a < temp.length(); a++) {
if (temp.charAt(a) == '-') {
temp.deleteCharAt(a);
WritingZone.setText(temp.toString());
} else {
WritingZone.setText("-" + temp.toString());
}
}
}
}
});
OperationArray[0].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == OperationArray[0]) {
String temp = WritingZone.getText();
String temp2 = "";
WritingZone.setText("");
for (int x = 0; x < temp.length() - 1; x++) {
temp2 += (Character.toString(temp.charAt(x)));
}
WritingZone.setText(temp2);
}
}
});
OperationArray[1].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == OperationArray[1]) {
WritingZone.setText("");
first = 0;
second = 0;
}
}
});
OperationArray[2].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
first = Double.valueOf(WritingZone.getText());
WritingZone.setText("");
operation = OperationArray[2].getText().charAt(0);
}
});
OperationArray[3].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
first = Double.valueOf(WritingZone.getText());
WritingZone.setText("");
operation = OperationArray[3].getText().charAt(0);
}
});
OperationArray[4].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
first = Double.valueOf(WritingZone.getText());
WritingZone.setText("");
operation = OperationArray[4].getText().charAt(0);
}
});
OperationArray[5].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
first = Double.valueOf(WritingZone.getText());
WritingZone.setText("");
operation = OperationArray[5].getText().charAt(0);
}
});
OperationArray[6].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String temp = String.valueOf(result);
String temp2 = WritingZone.getText();
WritingZone.setText("");
WritingZone.setText(temp2 + "" + temp);
}
});
OperationArray[7].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (operation == '*') {
String temp = WritingZone.getText();
WritingZone.setText("");
second = Double.valueOf(temp);
result = (first * second);
String temp2 = String.valueOf(result);
WritingZone.setText(temp2);
} else if (operation == '/') {
String temp = WritingZone.getText();
WritingZone.setText("");
second = Double.valueOf(temp);
if (second < 0) {
result = (first/second);
String temp2 = String.valueOf(result);
WritingZone.setText(temp2);
} else if (second > 0) {
result = (first/second);
String temp2 = String.valueOf(result);
WritingZone.setText(temp2);
} else if (second == 0) {
WritingZone.setText("Error! Can't divide by 0");
}
} else if (operation == '+') {
String temp = WritingZone.getText();
WritingZone.setText("");
second = Double.valueOf(temp);
result = (first + second);
String temp2 = String.valueOf(result);
WritingZone.setText(temp2);
} else if (operation == '-') {
String temp = WritingZone.getText();
WritingZone.setText("");
second = Double.valueOf(temp);
result = (first - second);
String temp2 = String.valueOf(result);
WritingZone.setText(temp2);
}
}
});
final JPanel AllPanel = new JPanel();
AllPanel.setLayout(new BorderLayout(5, 5));
AllPanel.add(BorderLayout.NORTH, TextPanel);
AllPanel.add(BorderLayout.CENTER, Finalpanel);
AllPanel.setBorder(BorderFactory.createTitledBorder("Simple Calculator"));
emptyPanel.add(AllPanel);
emptyPanel.setVisible(true);
pack();
}
}
}
});
b2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == b2) {
System.exit(0);
}
}
});
}
public static void main(String[] arg) {
JFrame frame = new Calculator();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.pack();
frame.setResizable(false);
}
}
그것은 효과가 있었다. 당신이 말했던 것처럼했고 내가 찾던 결과를 얻었습니다. – Javabeginner
다행이 도왔다 ... – MadProgrammer