简介
java 文本窗口
code
package calcu;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class TextComponentFrame extends JFrame {
public static final int TEXTAREA_ROWS = 8;
public static final int TEXTAREA_COLUMNS = 20;
public static void main(String[] args) {
TextComponentFrame t = new TextComponentFrame();
t.setTitle("ImageTest");
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
t.setVisible(true);
}
public TextComponentFrame() {
JTextField textField = new JTextField();
JPasswordField passwordField = new JPasswordField();
JPanel northPanel = new JPanel();
northPanel.setLayout(new GridLayout(2, 2));
northPanel.add(new JLabel("User name:", SwingConstants.RIGHT));
northPanel.add(textField);
northPanel.add(new JLabel("Password: ", SwingConstants.RIGHT));
northPanel.add(passwordField);
add(northPanel, BorderLayout.NORTH);
JTextArea textArea = new JTextArea(TEXTAREA_ROWS, TEXTAREA_COLUMNS);
JScrollPane scrollPane = new JScrollPane(textArea);
add(scrollPane, BorderLayout.CENTER);
// add button to append text into the text area
JPanel southPanel = new JPanel();
JButton insertButton = new JButton("Insert");
southPanel.add(insertButton);
insertButton.addActionListener(event -> textArea.append(
"User name :" + textField.getText() + "Password: " + new String(passwordField.getPassword()) + "
"));
add(southPanel, BorderLayout.SOUTH);
pack();
}
}
Q&A
滚动窗口应该是textArea的子类。