.jar不会显示

时间:2012-03-02 03:25:27

标签: java execute

好吧,所以,出于某种原因,我的.jar即使在eclipse中执行也不会执行。继承我的代码,它不是最好的,但我正在试验。我需要一些帮助才能让它在eclipse之外作为.jar文件执行。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Calendar;  // only need this one class
import javax.swing.*;
////////////////////////////////////////////////////////////////// TextClock
public class CopyOftheclock {
//================================================================= main
public static void main(String[] args) {
    JFrame clock = new TextClockWindow();
    clock.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    clock.setVisible(true);
}//end main
}//endclass TextClock


@SuppressWarnings("serial")
//////////////////////////////////////////////////////////// TextClockWindow
class TextClockWindow extends JFrame {
//=================================================== instance variables
private JTextField timeField;  // set by timer listener

//========================================================== constructor
public TextClockWindow() {
    // Build the GUI - only one panel
    timeField = new JTextField(7);
    timeField.setFont(new Font("sansserif", Font.PLAIN, 48));

    Container content = this.getContentPane();
    content.setLayout(new FlowLayout());
    content.add(timeField); 

    this.setTitle("Norway");
    this.pack();

    // Create a 1-second timer and action listener for it.
    // Specify package because there are two Timer classes
    javax.swing.Timer t = new javax.swing.Timer(1000,
          new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                  String a = "";
                  Calendar now = Calendar.getInstance();
                  int h = now.get(Calendar.HOUR_OF_DAY);
                    if (h==24)
                    {
                        h=8;
                        a = "A.M";
                    }
                    if (h==1)
                    {
                        h=9;
                        a = "A.M";
                    }
                    if (h==2)
                    {
                        h=10;
                        a = "A.M";
                    }
                    if (h==3)
                    {
                        h=11;
                        a = "A.M";
                    }
                    if (h==4)
                    {
                        h=12;
                        a = "P.M";
                    }
                    if (h==5)
                    {
                        h=1;
                        a = "P.M";
                    }
                    if (h==6)
                    {
                        h=2;
                        a = "P.M";
                    }
                    if (h==7)
                    {
                        h=3;
                        a = "P.M";
                    }
                    if (h==8)
                    {
                        h=4;
                        a = "P.M";
                    }
                    if (h==9)
                    {
                        h=5;
                        a = "P.M";
                    }
                    if (h==10)
                    {
                        h=6;
                        a = "P.M";
                    }
                    if (h==11)
                    {
                        h=7;
                        a = "P.M";
                    }
                    if (h==12)
                    {
                        h=8;
                        a = "P.M";
                    }
                    if (h==13)
                    {
                        h=9;
                        a = "P.M";
                    }
                    if (h==14)
                    {
                        h=10;
                        a = "P.M";
                    }
                    if (h==15)
                    {
                        h=11;
                        a = "P.M";
                    }
                    if (h==16)
                    {
                        h=12;
                        a = "P.M";
                    }
                    if (h==17)
                    {
                        h=1;
                        a = "A.M";
                    }
                    if (h==18)
                    {
                        h=2;
                        a = "A.M";
                    }
                    if (h==19)
                    {
                        h=3;
                        a = "A.M";
                    }
                    if (h==20)
                    {
                        h=4;
                        a = "A.M";
                    }
                    if (h==21)
                    {
                        h=5;
                        a = "A.M";
                    }
                    if (h==22)
                    {
                        h=6;
                        a = "A.M";
                    }
                    if (h==23)
                    {
                        h=7;
                        a = "A.M";
                    }
                  int m = now.get(Calendar.MINUTE);
                  int s = now.get(Calendar.SECOND);
                  timeField.setText("" + h + ":" + m + ":" + s + " " + a);
              }

          });
    t.start();  // Start the timer
}//end constructor
}//endclass TextClock

1 个答案:

答案 0 :(得分:2)

制作Jar

导出为可运行的jar

enter image description here enter image description here

如果您成功制作了一个罐子,那么请按照下一步操作。

从控制台

运行它

方法1

java [-options] -jar jarfile [args...]

注意:其中[-options]是JVM的参数,[args...]是jar的

此外,只有当你的jar清单有一个主类的条目时才会有效:

Manifest-Version: 1.0
Class-Path: .
Main-Class: CopyOftheclock

方法2

像这样设置你的类路径:

set classpath=clock.jar;.;%classpath%

之后:

java [-options] class [args...]

class是使用main方法的类。 class也应该是完全合格的,即如果它在package a.b.c,则该类应为a.b.c.CopyOftheclock。此外,您应该从最顶层的包父进行java命令。

方法3

我不确定基于* nix的操作系统,但在Windows上只需右键单击jar并选择使用javajavaw运行。但是为此,清单文件必须具有main class条目,否则它将失败。

注意:有关java -help

的更多详情,请参阅[options]