我正在开发一个应用程序,它会查询数据库并将信息展示在几个添加到JFrame的JPanels上。每30秒钟,我会将其中一个面板的可见性设置为false,另一个设置为true,以交替显示。
在Windows上,这个应用程序表现得非常好,但是当我将它放在我的Ubuntu机器上(运行XFCE和openjdk-7-jre),这些面板就不会显示出来了。然而,JFrame中的其他组件确实出现了,我不知道出了什么问题。同样的代码在Windows上运行正常,在Ubuntu上却不行。
我尝试简化我的代码以便单独编译和运行,但是我知道我的代码很混乱。我几乎没有做过Java编程,所以对于所有这些丑陋的代码,我感到很抱歉!我还删除了数据库相关的代码,因为那部分已经能够工作,对于你们来说无关紧要。
谢谢任何能够指导我正确方向的人!
在Windows上,这个应用程序表现得非常好,但是当我将它放在我的Ubuntu机器上(运行XFCE和openjdk-7-jre),这些面板就不会显示出来了。然而,JFrame中的其他组件确实出现了,我不知道出了什么问题。同样的代码在Windows上运行正常,在Ubuntu上却不行。
我尝试简化我的代码以便单独编译和运行,但是我知道我的代码很混乱。我几乎没有做过Java编程,所以对于所有这些丑陋的代码,我感到很抱歉!我还删除了数据库相关的代码,因为那部分已经能够工作,对于你们来说无关紧要。
谢谢任何能够指导我正确方向的人!
package productivityDisplay;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class Display implements ActionListener {
// Sizing constants
public boolean trimNames = false; // if true, trims to 10 characters (use
// this if something is cut off)
int refreshRate = 600000; // Refresh rate for Data (milliseconds)
int margin = 2;
int labelHeight = 76;
Font defaultFont = new Font("Tahoma", Font.PLAIN, 50);
Color DodgerBlue = new Color(30, 144, 255);
Color OrangeRed = new Color(255, 69, 0);
Color DarkGreen = new Color(0, 100, 0);
// End Sizing constants
// Controls
private JLabel lblCountDown;
public int countDown;
private Timer refresh;
private JFrame frame;
private JLabel lblCurrTime;
private JPanel pnlGrind1, pnlGrind2;
private JLabel lblWeekSummary, lblRepairCredit,
lblRepair2Count, lblCustom1, lblCustom2,
lblQC, lblRepair, lblRepair2;
@SuppressWarnings("rawtypes")
private JComboBox cmbTeamNames;
// End Controls
// Data Variables
private int currentTeam;
// End Data Variables
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
Display window = new Display(1); // Attempts to show
// the
// window
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
throw new Error("Yeah, it's broken.");
}
}
});
}
public Display(int team) {
initialize();
cmbTeamNames.setSelectedIndex(team);
getData();
}
/**
* @wbp.parser.entryPoint
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
private void initialize() {
frame = new JFrame();
frame.setVisible(true);
frame.setExtendedState(frame.getExtendedState() | JFrame.MAXIMIZED_BOTH); // Maximize
// Window
int width = frame.getWidth();
int height = frame.getHeight();
//frame.setResizable(true); // Can't be resized
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setLayout(null);
// MASSIVE CHUNK OF LAYOUT CODE //
String[] strTeamNames = { "", "Grinding", "Finishing" };
cmbTeamNames = new JComboBox(strTeamNames); // Combo Box (Grinding,
// finishing)
cmbTeamNames.setFont(new Font("Tahoma", Font.PLAIN, 40));
cmbTeamNames.setBounds(20, 11, 297, 67);
frame.getContentPane().add(cmbTeamNames);
cmbTeamNames.setName("cmbTeamNames");
cmbTeamNames.addActionListener(this);
lblCurrTime = new JLabel("Clock");
lblCurrTime.setFont(new Font("Tahoma", Font.PLAIN, 99));
lblCurrTime.setBounds((width - 350), 11, 300, 100);
frame.getContentPane().add(lblCurrTime);
countDown = 0;
lblCountDown = new JLabel("Next update in: "+countDown);
lblCountDown.setFont(new Font("Tahoma", Font.PLAIN, 40));
lblCountDown.setBounds(cmbTeamNames.getX() + cmbTeamNames.getWidth()
+ 40, 20, 400, 50);
frame.getContentPane().add(lblCountDown);
// Grinding Layout 2
pnlGrind2 = new JPanel();
pnlGrind2.setBounds(20, 89, (width - 50), height - 130);
frame.getContentPane().add(pnlGrind2);
pnlGrind2.setLayout(null);
pnlGrind2.setBorder(BorderFactory.createLineBorder (Color.blue, 2));
// Column1
JSeparator separator = new JSeparator();
separator.setBounds(0, (labelHeight + margin - 1), 300, 10);
pnlGrind2.add(separator);
// End Column1
// Column2
int leftSet = 450;
JSeparator separator2 = new JSeparator();
separator2.setBounds(leftSet, (labelHeight + margin - 1), 200, 10);
pnlGrind2.add(separator2);
// End Column2
// Column3
leftSet = 750;
JSeparator separator3 = new JSeparator();
separator3.setBounds(leftSet, (labelHeight + margin - 1), 200, 10);
pnlGrind2.add(separator3);
// End Column3
// Bottom rows
lblRepair2 = new JLabel("Repair Credit:");
pnlGrind2.add(lblRepair2);
lblRepair2.setFont(defaultFont);
lblRepair2.setForeground(DodgerBlue);
lblRepair2Count = new JLabel("");
lblRepair2Count.setBounds(lblRepair2.getX() + lblRepair2.getWidth()
+ margin, lblRepair2.getY(), 515, labelHeight);
pnlGrind2.add(lblRepair2Count);
lblRepair2Count.setFont(defaultFont);
lblRepair2Count.setForeground(DodgerBlue);
// End Bottom rows
pnlGrind2.setVisible(false);
pnlGrind2.setBackground(new Color(0, 0, 204)); // Used to see panel
// better
// End Grinding Layout 2
// Grinding Layout 1
pnlGrind1 = new JPanel();
pnlGrind1.setBounds(20, 89, (width - 50), height - 130);
frame.getContentPane().add(pnlGrind1);
pnlGrind1.setLayout(null);
pnlGrind1.setBorder(BorderFactory.createLineBorder (Color.blue, 2));
pnlGrind1.setVisible(false);
pnlGrind1.setBackground(new Color(255, 0, 204)); // Used to see panel
// better
// Left Side
lblWeekSummary = new JLabel("Week Summary (Measured at Buffing)");
lblWeekSummary.setBounds(0, 0, 515, 37);
pnlGrind1.add(lblWeekSummary);
lblWeekSummary.setFont(new Font("Tahoma", Font.PLAIN, 30));
// Spacing
lblCustom1 = new JLabel("Custom:");
lblCustom1.setBounds(0,
lblWeekSummary.getY() + (lblWeekSummary.getHeight() + margin)
* 2, 515, labelHeight);
pnlGrind1.add(lblCustom1);
lblCustom1.setFont(defaultFont);
lblCustom1.setForeground(OrangeRed);
lblRepairCredit = new JLabel("Repair Credit:");
lblRepairCredit.setBounds(0,
lblCustom1.getY() + (lblCustom1.getHeight() + margin), 515,
labelHeight);
pnlGrind1.add(lblRepairCredit);
lblRepairCredit.setFont(defaultFont);
lblRepairCredit.setForeground(DodgerBlue);
// Spacing
lblQC = new JLabel("QC");
lblQC.setBounds(
0,
(int) (lblRepairCredit.getY() + (lblRepairCredit.getHeight() + margin) * 1.5),
515, labelHeight);
pnlGrind1.add(lblQC);
lblQC.setFont(defaultFont);
lblQC.setForeground(DarkGreen);
lblCustom2 = new JLabel("Custom:");
lblCustom2.setBounds(0, lblQC.getY() + (lblQC.getHeight() + margin),
515, labelHeight);
pnlGrind1.add(lblCustom2);
lblCustom2.setFont(defaultFont);
lblCustom2.setForeground(DarkGreen);
lblRepair = new JLabel("Repair:");
lblRepair.setBounds(0, lblCustom2.getY()
+ (lblCustom2.getHeight() + margin), 515, labelHeight);
pnlGrind1.add(lblRepair);
lblRepair.setFont(defaultFont);
lblRepair.setForeground(DarkGreen);
// End Left Side
// Right Side
// End Right Side
// End Grinding Layout 1
// END MASSIVE CHUNK OF LAYOUT CODE //
frame.pack();
frame.setExtendedState(frame.getExtendedState() | JFrame.MAXIMIZED_BOTH); // Maximize
// Window
}
// Thread classes
public void getData() {
ActionListener updateData = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
pnlGrind1.repaint();
pnlGrind2.repaint();
countDown = 15;
}
};
refresh = new Timer(refreshRate, updateData);
refresh.start();
}
// End Thread Classes
public void actionPerformed(ActionEvent e) { // Combo box to select team was
// clicked
int team;
team = cmbTeamNames.getSelectedIndex();
currentTeam = team;
countDown=600;
int t2Interval = 5000;
if (team == 1) { // Grinding team
pnlGrind1.setVisible(true);
}
ActionListener alternatePnl = new ActionListener() {
public void actionPerformed(ActionEvent evt) {
// updateData();
alternatePanel(cmbTeamNames.getSelectedIndex());
}
};
new Timer(t2Interval, alternatePnl).start();
}
void alternatePanel(int team) {
if (team == 1) { // If Grinding team
if (pnlGrind1.isVisible()) {
pnlGrind1.setVisible(false);
pnlGrind2.setVisible(true);
} else {
pnlGrind2.setVisible(false);
pnlGrind1.setVisible(true);
}
}
}
}
null
/Absolute
布局。使用适当的 LayoutManager,在设置可见性之前调用JFrame
上的pack()
方法。ActionListener
,但我怀疑这种情况。DISPOSE_ON_CLOSE
,而应该使用EXIT_ON_CLOSE
。DISPOSE_ON_CLOSE
,如果在关闭框架后JVM仍在运行,则应该调查并处理原因(例如关闭计时器,停止网络访问...)。请注意,我不会在使用Timer
的SSCCE上遵循这个建议,但当我这样做时,我感到有点“不舒服”。 - Andrew Thompson