[英]How to get data of a specific field from mySQL into a JLabel in java?
[英]How to get data from a textfield in java and display it into a jlabel on the second form
我試圖構建一個簡單的Java GUI應用程序,以從用戶獲取數據並將其顯示在標簽上。
我從互聯網上獲得了此代碼,但它使用一個單獨的窗格來顯示結果。
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);
}
從TextField( textField
)獲取文本。
String text=textField.getText().toString();
現在,使用JLabel
上的setText
將其設置為標簽。
jlabel.setText(text);
new SecondForm(jlabel,text).setVisible(true);
如果下一個表單上存在標簽,請說出SecondForm。 在步驟1之后跳過步驟2並執行步驟3
public class SecondForm extends JFrame{
public SecondForm(JLabel label,String text){
label.setText(text); }
}
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