我使用以下代码将一些坐标从一个类传递到另一个类
**已编辑以显示更多细节
在第 1 课开始时：
public class BattleGui implements ActionListener {
private int xCoordinate;
private int yCoordinate;
public void coordinateHandler(int xCoord, int yCoord) {
xCoordinate=xCoord;
yCoordinate=yCoord;
System.out.println("Coordinates Received "+xCoord + " " +yCoord);
System.out.println("Test "+xCoordinate + " " +yCoordinate);
}
public void actionPerformed(ActionEvent e) {
String classname = getClassName(e.getSource());
JComponent component = (JComponent)(e.getSource());
cellState cs = new cellState();
if (classname.equals("JMenuItem")) {
JMenuItem menusource = (JMenuItem)(e.getSource());
String menutext = menusource.getText();
// Determine which menu option was chosen
if (menutext.equals("Load Game")) {
/* BATTLEGUI Add your code here to handle Load Game **********/
System.out.println(cs.turnFeedback());
LoadGame();
}
else if (menutext.equals("Save Game")) {
/* BATTLEGUI Add your code here to handle Save Game **********/
SaveGame();
}
else if (menutext.equals("New Game")) {
/* BATTLEGUI Add your code here to handle Save Game **********/
NewGame();
}
}
// Handle the event from the user clicking on a command button
else if (classname.equals("JButton")) {
JButton button = (JButton)(e.getSource());
int bnum = Integer.parseInt(button.getActionCommand());
int row = bnum / GRID_SIZE;
int col = bnum % GRID_SIZE;
//col=yCoord;
//row=xCoord;
//System.out.println(e.getSource());
//System.out.println(bnum / GRID_SIZE);
fireShot(row, col);
if (row==xCoordinate){
if (col==yCoordinate){
button.setBackground(cellColour[cs.turnFeedback()]);
}
else {
//Remember to change the 1 to whatever is reported back from cell class cell state
//button.setBackground(cellColour[cs.turnFeedback()]);
button.setBackground(Color.BLUE);
}
}
else {
button.setBackground(Color.BLUE);
}
}
}
从类2：
public void shipDeploy() {
int gridLength;
int lengthDraw;
int winningNumbers = 0;
int xCoord;
int yCoord;
xCoord=99;
yCoord=100;
System.out.println(xCoord + "\n" + yCoord);
BattleGui bGui = new BattleGui();
//Passing the coordinates back to the battlegui coordinate handler class
bGui.coordinateHandler(xCoord, yCoord);
}
这会将这两个值传递给第一个类中的坐标处理程序方法。
在这个类中，我有一个在各种方法中使用的 xCoordinate 变量，问题是我似乎无法设置它，对于 xCoordinate 和 yCoordinate，总是在此方法之外返回 0，我不明白为什么，因为它们在上面的行中似乎没问题System.out.println("Test "+xCoordinate + " " +yCoordinate);。