Java 向JComboBox和JTextField添加标签

您好，我在向组合框和文本字段添加标签时遇到问题。它编译得很好，但只显示框，而没有标签

import javax.swing. *;
import java.awt.event. *;   
import java.awt.FlowLayout;        

public class AreaFrame2  
{  

   public static void main(String[]args)  
   { 

      //Create array containing shapes  
      String[] shapes ={"(no shape selected)","Circle","Equilateral Triangle","Square"};  

      //Use combobox to create drop down menu
      JComboBox comboBox=new JComboBox(shapes);
      JPanel panel1 = new JPanel(); 
      JLabel label1 = new JLabel("Select shape:");
      panel1.add(label1);
      comboBox.add(panel1);
      JButton button = new JButton("GO");
      JTextField text = new JTextField(20);

      //Create a JFrame that will be use to put JComboBox into it 
      JFrame frame=new JFrame("Area Calculator Window");  
      frame.setLayout(new FlowLayout()); //set layout
      frame.add(comboBox);//add combobox to JFrame
      text.setLocation(100,100);
      frame.add(text);
      frame.add(button);

      //set default close operation for JFrame 
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      //set JFrame ssize 
      frame.setSize(250,250);  

      //make JFrame visible. So we can see it 
      frame.setVisible(true);  

   }  
}  

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我认为下面的代码或多或少会产生您所期望的结果

    public static void main(String[]args)
{
    //Create array containing shapes
    String[] shapes ={"(no shape selected)","Circle","Equilateral Triangle","Square"};

    //Use combobox to create drop down menu
    JComboBox comboBox=new JComboBox(shapes);
    JPanel panel1 = new JPanel(new FlowLayout());
    JLabel label1 = new JLabel("Select shape:");
    panel1.add(label1);
    panel1.add(comboBox);

    JButton button = new JButton("GO");
    JTextField text = new JTextField(20);
    //Create a JFrame that will be use to put JComboBox into it
    JFrame frame=new JFrame("Area Calculator Window");
    frame.setLayout(new FlowLayout()); //set layout
    frame.add(panel1);
    frame.add(text);
    frame.add(button);
    //set default close operation for JFrame
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //set JFrame ssize
    frame.setSize(250,250);

    //make JFrame visible. So we can see it
    frame.setVisible(true);
}

---

你的代码很难读懂，因为你已经用空格写得太多了。请编辑您的代码，使我们能够更轻松地帮助您。为什么要将JPanel添加到JComboBox？这不是JComboBox的正确用法。你想用它做什么？如果我必须自己修复你的代码，那就见鬼吧……我想在JComboBox的左侧显示一些类似“选择形状”的文字，但这不是怎么做到的。请花些时间和精力准确地描述一下你想做什么。你还有太多的话没说。或者更好的是，展示一幅你想要的结果的图片。