Java 检测控制台中的按键
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Detect a key press in console
提问by LightMikeE
I want to execute a certain function when a user presses a key. This will be run in the console, and the code is in Java. How do I do this? I have almost zero knowledge of key presses/keydowns, so I could really use an explanation as well.
我想在用户按下某个键时执行某个功能。这将在控制台中运行，代码使用 Java。我该怎么做呢？我对按键/按键的知识几乎为零，因此我也可以真正使用解释。
采纳答案by Gren
If you want to play with the console, you can start with this:
如果你想玩控制台，你可以从这个开始：
import java.util.Scanner;
public class ScannerTest {
public static void main(String[] args) {
Scanner keyboard = new Scanner(System.in);
boolean exit = false;
while (!exit) {
System.out.println("Enter command (quit to exit):");
String input = keyboard.nextLine();
if(input != null) {
System.out.println("Your input is : " + input);
if ("quit".equals(input)) {
System.out.println("Exit programm");
exit = true;
} else if ("x".equals(input)) {
//Do something
}
}
}
keyboard.close();
}
}
Simply run ScannerTest and type any text, followed by
只需运行 ScannerTest 并输入任何文本，然后输入
回答by SalGnt
You can't detect an event in the command line environment. You should provide a GUI, and then you can use the KeyListenerclass to detect a keyboard event.
您无法在命令行环境中检测到事件。您应该提供一个 GUI，然后您可以使用KeyListener该类来检测键盘事件。
Alternatively you can read commands from standard input and then execute a proper function.
或者，您可以从标准输入读取命令，然后执行适当的功能。
