java 向 JComboBox 和 JTextField 添加标签
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时间：2020-10-31 13:51:33 来源:igfitidea点击:
Adding a label to a JComboBox and JTextField
提问by Ikemesit Ansa
Hi I am having trouble adding labels to my combo box and textfield.It compiles fine but only shows the boxes but without labels.
嗨，我在向我的组合框和文本字段添加标签时遇到了问题。它编译得很好，但只显示框但没有标签。
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);
}
}
回答by ben75
I think the following code will produce more or less what you expect.
我认为以下代码或多或少会产生您期望的结果。
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);
}
