Question

我正在使用Eclipse Neon中的第一个Java库GUI。我创建了一个内容窗格，并为其提供了一些代码，可以在按下按钮时打印出来。问题是我无法运行该程序。 Eclipse不会显示运行按钮。显示的唯一按钮是“外部工具”按钮。代码中是否存在我缺少的问题，还是其他问题？

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JList;
import javax.swing.JTextField;
import javax.swing.JScrollBar;
import java.awt.Color;

import javax.swing.JButton;
import javax.swing.border.MatteBorder;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

@SuppressWarnings("serial")
public class Test extends JFrame {

private JPanel contentPane;
private JLabel label;
private JTextField textField;

/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                Test frame = new Test();
                frame.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the frame.
 */
public Test() {
    super("Test GUI");
    setBackground(Color.GREEN);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 593, 458);
    contentPane = new JPanel();
    contentPane.setBackground(new Color(240, 248, 255));
    contentPane.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(0, 0, 0)));
    setContentPane(contentPane);
    contentPane.setLayout(null);

    JTextArea textArea = new JTextArea();
    textArea.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(0, 0, 0)));
    textArea.setBounds(10, 11, 355, 366);
    contentPane.add(textArea);

    JScrollBar scrollBar = new JScrollBar();
    scrollBar.setBounds(371, 11, 17, 366);
    contentPane.add(scrollBar);

    @SuppressWarnings("rawtypes")
    JList list = new JList();
    list.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(0, 0, 0)));
    list.setBounds(398, 44, 139, 333);
    contentPane.add(list);

    JScrollBar scrollBar_1 = new JScrollBar();
    scrollBar_1.setBounds(543, 48, 17, 329);
    contentPane.add(scrollBar_1);

    JButton button = new JButton("Log Out");
    button.setBounds(438, 11, 71, 23);
    contentPane.add(button);

    textField = new JTextField();
    textField.setColumns(10);
    textField.setBounds(10, 384, 460, 20);
    contentPane.add(textField);

    JButton button_1 = new JButton("Send");
    button_1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            label.setText("Yeah, It Works!!!");
            textArea.add(label);
        }
    });
    button_1.setBounds(488, 383, 57, 23);
    contentPane.add(button_1);
}
}

这是eclipse截图的链接。请注意，菜单选项中没有运行按钮： Screenshot of Eclipse Neon

提前致谢

Eclipse Neon不允许我使用JFrame运行

0 个答案: