本文介紹了在 Swing 中停止事件的默認行為的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
我在通過單擊發送按鈕或在一段代碼的消息文本字段中按 Enter 調用的方法中有以下代碼.
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("");
}
最后一段代碼使文本區域空白.但是，在按回車鍵發送消息后，文本框不是空的，而是包含換行符.
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.
我的猜測是，在我的事件處理程序運行后，將添加換行符.如何停止添加換行符?
My guess is that after my event handler runs, THEN the newline character is being added. How to I stop the newline being added?
推薦答案
嘗試在調用 sendMessage()
private void messageTextAreaKeyPressed(java.awt.event.KeyEvent evt) {
if(evt.getKeyCode() == java.awt.event.KeyEvent.VK_ENTER) {
sendMessage();
evt.consume();
}
}
這篇關于在 Swing 中停止事件的默認行為的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！
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