我已經創建了一個GUI，每次按下某個鍵時都會打印出一個列表。或者我認爲......但不是運行我在按鍵上所做的功能，而是一直使用GUI。如何阻止我的GUI無限期地打印文本？ - Java
這裏是我的代碼：
package main;
import java.util.ArrayList;
import javax.swing.*;
import java.awt.*;
public class Elements{
static ArrayList<String> composition = new ArrayList<String>();
static Boolean x = true;
static JLabel gLabel = GUI();
public static void main(String[] args){
while(x == true){
gLabel.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("Q"), "water");
gLabel.getActionMap().put("water", water());
gLabel.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("W"), "life");
gLabel.getActionMap().put("life", life());
}
}
public static Action water(){
if(composition.contains("Fire")){
composition.remove("Fire");
composition.add("Steam");
} else if(composition.contains("Cold")){
composition.remove("Cold");
composition.add("Ice");
} else if(composition.contains("Arcane")){
composition.remove("Arcane");
composition.add("Poison");
} else if(composition.contains("Lightning")){
composition.remove("Lightning");
} else {
composition.add("Water");
}
int y = 0;
while(y < 100){
System.out.println("");
y++;
}
System.out.println(composition);
x = true;
return null;
}
public static Action life(){
if(composition.contains("Arcane")){
composition.remove("Arcane");
} else {
composition.add("Life");
}
int y = 0;
while(y < 100){
System.out.println("");
y++;
}
System.out.println(composition);
x = true;
return null;
}
private static JLabel GUI(){
JFrame frame = new JFrame("KeyPress Handler");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel label = new JLabel("This window listens for key presses and does stuff with them. Isn't that cool?");
label.setPreferredSize(new Dimension(175, 100));
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
return label;
}
}
而不是在按鍵運行life()和water()的，它運行他們所有的時間。
我得到的輸出，
[Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life, Water, Life]
而不觸及什麼！
我有不知道爲什麼發生這種情況，但我認爲它與做： gLabel.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("Q"), "water");
和：
gLabel.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("W"), "life");
如果有人能告訴我是什麼問題以及如何解決它，這將是偉大的。
謝謝， 海倫
PS：我加入2-新行： gLabel.getInputMap(JComponent.WHEN_FOCUSED).put(KeyStroke.getKeyStroke("Enter"), "stop"); gLabel.getActionMap().put("stop", stop());
功能stop()如下：
public static Action stop(){ x = false; return null;
據我所知，這意在添加stop()到的新密鑰綁定。
此外，進行這些更改後，輸出減少到[Water, Life]。
（另外，固定while循環）
對不起有些模糊。 – Helen
'while（x = true）'應該是'while（x == true）'，但這並不能解決問題。 –
問題是，在你的代碼中沒有任何地方，'x'有可能被改爲'false' –