在 Swing 中停止事件的默认行为

问题描述

我在通过单击发送按钮或在一段代码的消息文本字段中按 Enter 调用的方法中有以下代码.

I have the following bit of code in a method called by clicking the send button, or pressing enter in the message text field in a piece of code.

// In class ChatWindow
private void messageTextAreaKeyPressed(java.awt.event.KeyEvent evt) { // Event handler created by Netbeans GUI designer to call this method.           
    if(evt.getKeyCode() == java.awt.event.KeyEvent.VK_ENTER) {
        sendMessage();
    }
}   
public void sendMessage() {
    String currentMessage = messageTextArea.getText();
    addMessage("You", currentMessage);
    app.sendMessage(currentMessage, 1);
    messageTextArea.setText("");
}

最后一段代码使文本区域空白.但是，在按回车键发送消息后，文本框不是空的，而是包含换行符.

The last bit of code blanks the text area. However, after a message is sent by pressing the enter button, rather than being empty, the text box contains a newline.

我的猜测是，在我的事件处理程序运行后，将添加换行符.如何停止添加换行符?

My guess is that after my event handler runs, THEN the newline character is being added. How to I stop the newline being added?

推荐答案

尝试在调用 sendMessage()

private void messageTextAreaKeyPressed(java.awt.event.KeyEvent evt) { 
 if(evt.getKeyCode() == java.awt.event.KeyEvent.VK_ENTER) {
    sendMessage();
    evt.consume();
 }
}  

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