如何从java中的文本字段中获取数据并将其显示在第二种形式的jlabel中
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How to get data from a textfield in java and display it into a jlabel on the second form
提问by subas chandran
I was trying to build a simple java GUI application to get the data from the user and display it to the label.
我试图构建一个简单的 java GUI 应用程序来从用户那里获取数据并将其显示到标签上。
I got this code from the internet but it is using a separate pane for displaying the result.
我从互联网上得到了这段代码，但它使用一个单独的窗格来显示结果。
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JTextFieldDemo extends JFrame {
//Class Declarations
JTextField jtfText1, jtfUneditableText;
String disp = "";
TextHandler handler = null;
//Constructor
public JTextFieldDemo() {
super("TextField Test Demo");
Container container = getContentPane();
container.setLayout(new FlowLayout());
jtfText1 = new JTextField(10);
jtfUneditableText = new JTextField("Uneditable text field", 20);
jtfUneditableText.setEditable(false);
container.add(jtfText1);
container.add(jtfUneditableText);
handler = new TextHandler();
jtfText1.addActionListener(handler);
jtfUneditableText.addActionListener(handler);
setSize(325, 100);
setVisible(true);
}
//Inner Class TextHandler
private class TextHandler implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == jtfText1) {
disp = "text1 : " + e.getActionCommand();
} else if (e.getSource() == jtfUneditableText) {
disp = "text3 : " + e.getActionCommand();
}
JOptionPane.showMessageDialog(null, disp);
}
}
//Main Program that starts Execution
public static void main(String args[]) {
JTextFieldDemo test = new JTextFieldDemo();
test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
采纳答案by cafebabe1991
Get the text from the TextField (
textField).String text=textField.getText().toString();Now set it to the label using
setTexton theJLabel.jlabel.setText(text);new SecondForm(jlabel,text).setVisible(true);
从 TextField (
textField) 中获取文本。String text=textField.getText().toString();现在将其设置为使用
setText上的标签JLabel。jlabel.setText(text);new SecondForm(jlabel,text).setVisible(true);
If the Label exists on the next form say SecondForm. Skip Step2 and Do Step 3 after step 1
如果标签存在于下一个表单上，请说 SecondForm。跳过步骤 2 并在步骤 1 之后执行步骤 3
public class SecondForm extends JFrame{
public SecondForm(JLabel label,String text){
label.setText(text); }
}
