當點擊按鈕 時,有什麼辦法刷新jLabel中的計數器嗎?我試着用repaint(),revalidate()方法,但都不起作用。在jLabel刷新計數器
當像按鈕上點擊:
jButton_like.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
int count = 1;
eForumLikeCounter likeAmount = new eForumLikeCounter(
userName, topicId, count);
if (likeAmount.checkLikeAmount() == true) {
JOptionPane
.showMessageDialog(null,
"Unable to perform like on the same thread by the same user");
} else if (likeAmount.checkDislikeExists() == true) {
JOptionPane
.showMessageDialog(null,
"You can only either like or dislike this thread");
} else {
likeAmount.likeCounter();
}
}
});
}
建立了數據庫:
public void SetUpLikeDislikeAmount() {
int likes = 0;
int dislike = 0;
// Set Up Database Source
db.setUp("IT Innovation Project");
String sql = "Select likeDislike_likes,likeDislike_dislike from forumLikeDislike WHERE likeDislike_topics = "
+ topicId + "";
ResultSet resultSet = null;
// Call readRequest to get the result
resultSet = db.readRequest(sql);
try {
while (resultSet.next()) {
likes += resultSet.getInt("likeDislike_likes");
dislike += resultSet.getInt("likeDislike_dislike");
}
resultSet.close();
} catch (Exception e) {
System.out.println(e);
}
jLabel_like.setText(Integer.toString(likes));
jLabel_dislike.setText(Integer.toString(dislike));
}
在此先感謝。
對於更早的幫助後SSCCE? – Amarnath
我試圖做喜歡和不喜歡的系統。所以無論何時點擊按鈕,標籤中的值都會刷新。數據庫中的數據完美工作,只是我不知道如何刷新/更新jLabel。 – Rauryn
點擊發生時使用'JLabel.setText'方法。 – Amarnath