java - How to check KeyListener input? -


in java.awt.event.keylistener, how check if user enters "+" or "- "?

here's code example of how this:

    textfield field = new textfield();     field.addkeylistener(new keylistener() {         public void keytyped(keyevent e) {             final char achar = e.getkeychar();             if (achar == '+') {                 system.out.println("+ typed");             }             if (achar == '-') {                 system.out.println("- typed");             }         }          public void keypressed(keyevent e) {         }          public void keyreleased(keyevent e) {         }     });

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