java - JLabel的显示数组

Question

已关闭。此问题需要 debugging details 。目前不接受答案。

---

编辑问题以包含 desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem 。这将有助于其他人回答问题。

已关闭 8 年前。

Improve this question

用于在 JPanel 中显示 10 个标签我使用 Netbeans for Java 使用了以下代码。没有得到任何输出。 JPanel布局设置为null布局。

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
   JLabel[] labels = new JLabel[10];
   for(int i=0; i<9; i++){
   labels[i] = new JLabel("Label Name " + i);
   p1.add(labels[i]);}
}

Answer 1

您需要调用validate向框架对象添加子组件后的方法。

The validate method is used to cause a container to lay out its subcomponents again. It should be invoked when this container's subcomponents are modified (added to or removed from the container, or layout-related information changed) after the container has been displayed.