所以我正在创建一个乌龟图形项目，而且在给定命令输入时我无法让乌龟移动。下面是两个交互类，我的TextPanel类处理用户输入，GraphicsPanel包含可绘制的＆＃39;画布＆＃39;等等。
由于我现在没有收到任何错误，我想知道我是否正确调用了GraphicsPanel类，或者我是否使用了repaint（）并且它是错误的方法？我不知所措，可以用一双新鲜的眼睛。谢谢你的时间。
if (boolean[y][x])这是我的GraphicsPanel类，包含命令函数和JPanel设置，包括bufferedimage等。
public class TextPanel extends JPanel implements ActionListener {
private JTextArea textArea;
private JScrollPane scrollPane;
private JTextField commField;
private JButton enterBut;
private TextListener textListener;
private GraphicsPanel graphicsPanel;
//***********//
//CONSTRUCTOR//
//***********//
public TextPanel() {
textArea = new JTextArea();
scrollPane = new JScrollPane ( textArea );
enterBut = new JButton("Execute");
commField = new JTextField(10);
graphicsPanel = new GraphicsPanel();
textArea.setLineWrap(true); //stops text from going outside
textArea.setWrapStyleWord(true); //panel boundaries
//**********************//
//COMMAND IMPLEMENTATION//
//**********************//
commField.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(commField.getText().contains("penup")) {
GraphicsPanel.penUp();
}
else if(commField.getText().contains("pendown")) {
GraphicsPanel.penDown();
}
else if(commField.getText().contains("turnright")) {
GraphicsPanel.turnRight();
}
else if(commField.getText().contains("turnleft")) {
GraphicsPanel.turnLeft();
}
else if(commField.getText().startsWith("forward")) { //getText method retrives user input from JTextField
String cForward = commField.getText(); //<startsWith> searches string for desired command
String[] cForwardArray = cForward.split("\\s+"); //string array created and split with " " as split
try {
int distance = Integer.parseInt(cForwardArray[1]); //parseInt takes the integer from string split
GraphicsPanel.forward(distance); //GraphicsPanel command called + distance integer
textArea.append(cForward + "\n"); //test for variable values
GraphicsPanel.validate();
GraphicsPanel.repaint(); //canvas is repainted
}
catch (Exception ev) {
JOptionPane.showMessageDialog(textArea,
"Invaild or missing parameter, check the help section\n"
+ "for more information on Commands");
}
}
else if(commField.getText().startsWith("backward")) {
String cBackward = commField.getText();
String[] cBackwardArray = cBackward.split("\\s+");
try {
int distance = Integer.parseInt(cBackwardArray[1]);
GraphicsPanel.backward(distance);
textArea.append(cBackward +"\n");
GraphicsPanel.repaint();
}
catch (Exception ev) {
JOptionPane.showMessageDialog(textArea,
"Invaild or missing parameter, check the help section\n"
+ "for more information on Commands");
}
}
else if(commField.getText().contains("black")) {
GraphicsPanel.black(Color.black);
}
else if(commField.getText().contains("green")) {
GraphicsPanel.green(Color.green);
}
else if(commField.getText().contains("red")) {
GraphicsPanel.red(Color.red);
}
else if(commField.getText().contains("reset")) {
GraphicsPanel.clear();
}
else {
JOptionPane.showMessageDialog(textArea, "Invalid command, try again");
}
commField.setText("");
GraphicsPanel.repaint();
}
});
//****************//
//PANEL DIMENSIONS//
//****************//
setBackground(Color.black);
Dimension dim = getPreferredSize(); //sets dimensions of panel
dim.width = 250;
setPreferredSize(dim);
//setBorder(BorderFactory.createTitledBorder("Enter Commands here: "));
//setTitleColor(Color.white); //not sure why this doesnt change the text colour
//**************//
//GRIDBAG LAYOUT//
//**************//
setLayout(new GridBagLayout());
GridBagConstraints constraint = new GridBagConstraints();
add(commField, constraint);
constraint.fill = GridBagConstraints.HORIZONTAL;
constraint.ipady = 20;
constraint.ipadx = 60;
constraint.insets = new Insets(10, 5, 0, 0);
constraint.weightx = 1;
constraint.weighty = 0;
constraint.gridx = 0; //grid position
constraint.gridy = 0;
add(commField, constraint);
//***********************//
constraint.fill = GridBagConstraints.HORIZONTAL;
constraint.ipady = 15;
constraint.ipadx = 25;
constraint.anchor = GridBagConstraints.PAGE_END; //anchors to bottom of GUI
constraint.insets = new Insets(10, 0, 0, 0); //inserts gap
constraint.weightx = 0;
constraint.weighty = 0;
constraint.gridx = 1;
constraint.gridy = 0;
add(enterBut, constraint);
//*************************//
constraint.fill = GridBagConstraints.BOTH; //option how to fill 'cell'
constraint.ipady = 150; //dim of component
constraint.ipadx = 150;
constraint.insets = new Insets(0, 5, 0, 0);
constraint.gridwidth = 3; //how many grid cell it spans
constraint.weightx = 1; //precedent for space
constraint.weighty = 1;
constraint.gridx = 0; //grid position
constraint.gridy = 1;
add(new JScrollPane(textArea), constraint); //adds component
//and JSCrollPane
//************************//
//**NOTES****************************//
//next time use smaller variable name//
//***********************************//
}
private void setTitleColor(Color white) {
}
public void appendText(String text) {
}
@Override
public void actionPerformed(ActionEvent e) {
}
public void setTextListener(textListener listener) {
this.TextListener = listener;
}
}
}