Question

所以我一直在玩GUI并为我的用户创建了一个相对不错的欢迎框架所述框架有两个文本选项，理论上每个文本选项应打开一个新窗口。

其中一个文本框架完全符合它的设想，根据需要打开一个新窗口，但另一个文本框架没有。

以下是我的代码：

package gui;

import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Frame1Welcome extends JFrame {

private JLabel intro1 = new JLabel(
        "Welcome to Twitter Farmer.");
private JLabel intro2 = new JLabel(
        "In order to start farming up those tweets, first decide if you want to farm for a specific amount of time, or farm a certain amount of tweets.");
private JLabel intro3 = new JLabel(
        "By specifying the amount of time you wish to farm for, Twitter Farmer will gather as many tweets as it can in said time.");
private JLabel intro4 = new JLabel(
        "If you know how many you want however, Twitter Farmer will instead gather up the exact desired amount.");
private JLabel intro5 = new JLabel(
        "Please enter the time in seconds, or the amount of tweets as whole number, and press the 'ENTER'-key.");

private JLabel tweets = new JLabel("Tweets:");
private JLabel time = new JLabel("Time:");

private JTextField twitterText = new JTextField(10);
private JTextField timeText = new JTextField(10);

private String inputText; // REMOVE ME

public Frame1Welcome(String title) {
    super(title);

    launchGUI.setMyDefaults(this, 800, 300);

    GridBagConstraints gbc = new GridBagConstraints();
    gbc.insets = new Insets(0, 0, 10, 0);

    JPanel northernPanel = new JPanel(new GridBagLayout());
    this.add(northernPanel, BorderLayout.NORTH);

    gbc.gridy = 0;
    northernPanel.add(intro1, gbc);
    gbc.gridy = 1;
    northernPanel.add(intro2, gbc);
    gbc.gridy = 2;
    northernPanel.add(intro3, gbc);
    gbc.gridy = 3;
    northernPanel.add(intro4, gbc);
    gbc.gridy = 4;
    northernPanel.add(intro5, gbc);

    JPanel southernPanel = new JPanel(new GridBagLayout());
    this.add(southernPanel, BorderLayout.CENTER);

    gbc.gridx = 0;
    southernPanel.add(tweets, gbc);
    gbc.gridx = 1;
    southernPanel.add(twitterText, gbc);

    gbc.gridy = 1;

    gbc.gridx = 0;
    southernPanel.add(time, gbc);
    gbc.gridx = 1;
    southernPanel.add(timeText, gbc);

    twitterText.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

            inputText = twitterText.getText(); // REMOVE ME
            dispose();

            System.out.println("TWEETS:" + inputText); // REMOVE ME

            try {
                new Frame3Tweets("Twitter Farmer - Tweet-farm by desired amount", Integer.parseInt(timeText.getText()));
                } catch (NumberFormatException error) {
                    //ADD INVALID NUMBER WINDOW 
                }

        }
    });

    timeText.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {

            inputText = timeText.getText(); // REMOVE ME
            dispose();

            System.out.println("TIME:" + inputText); // REMOVE ME

            try {
            new Frame2Time("Twitter Farmer - Tweet-farm over desired time", Integer.parseInt(timeText.getText()));
            } catch (NumberFormatException error) {
                //ADD INVALID NUMBER WINDOW 
            }

        }
    });

}

}

首先，所有评论只是提醒我稍后在代码中要做的事情。

其次，假设launchGUI.setMyDefaults(this, 800, 300);只是我设置大小和可见性的方法，而且它适用于其他窗口。

第三，假设new Frame2Time和new Frame3Tweets都是有效的。

我的问题是：

为什么timeText.addActionListener会创建一个新窗口，而twitterText.addActionListener却没有？

在用户发出号码后，我已尝试让twitterText.addActionListener制作其他窗口，而不会弹出任何此类窗口。

有人能告诉我我做错了什么，最好是如何解决它？

Answer 1

通过采纳Maroun Maroun的建议，并添加error.printStackTrace()我能够扣除我的问题：

try {
   new Frame3Tweets("Twitter Farmer - Tweet-farm by desired amount", Integer.parseInt(timeText.getText()));
} catch (NumberFormatException error) {
   error.printStackTrace(); 
}

该方法将timeText.getText()作为参数，该参数为空，因此强制所有内容崩溃并烧毁。

应该使用tweetText.getText()代替，它有一个值。

所以孩子们，请遵循Maroun Maroun的建议，不要将catch块留空！

第二个addActionListener在类中没有打开新窗口

1 个答案: