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首頁(yè)javajprogressbarJava Swing - 如何單擊按鈕后顯示ProgressBar

Java Swing - 如何單擊按鈕后顯示ProgressBar

我們想知道如何單擊按鈕后顯示ProgressBar。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
public class Main extends JFrame {
static Main f1 = null;
public static void main(String[] args) {
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JButton button = new JButton();
Main f = null;
f = new Main();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(700, 400);
panel1.setLayout(new BorderLayout());
panel1.setForeground(Color.white);
button.setText("Convert");
panel1.add(button, BorderLayout.SOUTH);
f.setContentPane(panel1);
f.setVisible(true);
 
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