[英]Jar does not run on command line
我確實通過Google和各種論壇(也是該論壇)進行搜索。
我已經創建了一個應用程序(一個Java基准測試),並且想要創建一個可運行的jar文件,以便在其他計算機上使用該程序。 不幸的是,jar無法正常工作,使用jar文件的代碼完成了所有工作,程序在命令行上運行。 我嘗試了在此論壇上找到的技巧來修復我的jar創建,但效果不佳。
奇怪的是,當我編譯JavaBenchmark.java文件時,我不僅得到了一個文件(JavaBenchmark.class),還沒有得到JavaBenchmark $ 1.class:O(任何人都知道為什么嗎?)
因此,我請您檢查我的代碼是否存在某些問題,我必須說這是一個GUI應用程序。
import java.io.*;
import java.util.Date;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JavaBenchmark implements ActionListener
{
private Frame mainWindow;
private Button exit;
private String dateAndTime;
private TextArea values;
private String stringMaxMemory;
private String stringFreeMemory;
private String stringTotalFreeMemory;
private String stringAllocatedMemory;
public JavaBenchmark(String s)
{
Date myDate = new Date();
dateAndTime = String.format("%tA, %<tF", myDate);
File[] roots = File.listRoots();
mainWindow = new Frame(s);
mainWindow.setSize(640,480);
mainWindow.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent we){System.exit(0);}});
String version = System.getProperty("java.version");
String jvmversion = System.getProperty("java.jvm.version");
String checkedJvmVersion;
if (jvmversion == null)
{
checkedJvmVersion = "Java Virtual Machine version: N/A";
}
else
{
checkedJvmVersion = "Java Virtual Machine version: " + jvmversion;
}
String jvmname = System.getProperty("java.vm.name");
String osname = System.getProperty("os.name");
String osarchitecture = System.getProperty("os.arch");
String osversion = System.getProperty("os.version");
String processor = System.getenv("PROCESSOR_IDENTIFIER");
int processorCores = Runtime.getRuntime().availableProcessors();
Runtime runtime = Runtime.getRuntime();
double freeMemory = runtime.freeMemory();
double allocatedMemory = runtime.totalMemory();
double maxMemory = runtime.maxMemory();
double totalFreeMemory = (freeMemory + (maxMemory - allocatedMemory));
stringFreeMemory = String.format("%5.2f", (freeMemory)/1024/1024);
stringAllocatedMemory = String.format("%5.2f", (allocatedMemory)/1024/1024);
stringMaxMemory = String.format("%5.2f", (maxMemory)/1024/1024);
stringTotalFreeMemory = String.format("%5.2f", (totalFreeMemory)/1024/1024);
exit = new Button("Exit"); exit.addActionListener(this);
values = new TextArea(30, 120);
Panel exitButton = new Panel();
exitButton.add(exit);
mainWindow.add(values, "North");
mainWindow.add(exitButton);
values.append("Your Java benchmark, as on: " + dateAndTime + "\n\n");
values.append("Java version: " + version + "\n");
values.append("Java Virtual machine version: " + checkedJvmVersion + "\n");
values.append("Java Virtual Machine name: " + jvmname + "\n");
values.append("\n");
values.append("Operating System: " + osname + "\n" + osarchitecture + " os version: " + osversion + "\n");
values.append("\n");
values.append("Processor: " + processor + " (number of cores: " + processorCores + ")\n");
values.append("\n");
values.append("Memory info: \n");
values.append("Maximum RAM memory for JVM: " + stringMaxMemory + " Mb\n");
values.append("Allocated RAM memory for JVM: " + stringAllocatedMemory + " Mb\n");
values.append("Free RAM memory for JVM: " + stringFreeMemory + " Mb\n");
values.append("Total free RAM memory for JVM: " + stringTotalFreeMemory + " Mb\n\n\n");
values.append("HardDrive, and VirtualDrive details:\n");
for (File root : roots) {
if (root.getTotalSpace() == 0)
{
continue;
}
else
{
values.append("Disk: " + root.getAbsolutePath() + " space allocation:\n");
values.append("Total space :");
values.append(String.format("%5.2f", Double.valueOf(root.getTotalSpace())/1024/1024/1024));
values.append(" Gb\n");
values.append("Free space : ");
values.append(String.format("%5.2f", Double.valueOf(root.getFreeSpace())/1024/1024/1024));
values.append(" Gb\n");
values.append("Occupied disk space : ");
values.append(String.format("%5.2f", Double.valueOf(root.getTotalSpace() - root.getFreeSpace())/1024/1024/1024));
values.append(" Gb\n\n");
}
}
mainWindow.pack(); //Creating the window
mainWindow.setLocationRelativeTo(null); //true: position at (0,0) false: position at center
mainWindow.setResizable(false); //Intuitively known commands
mainWindow.setVisible(true); //Intuitively known commands
}
public static void main(String[] args)
{
new JavaBenchmark("Display");
}
public void actionPerformed(ActionEvent e) {
if(e.getSource()==exit)
{
System.exit(0);
}
}
}
JavaBenchmark$1.class
是您在添加窗口偵聽器時為WindowAdapter
創建的匿名類。
至於Jar無法正常工作,您必須描述創建Jar所要執行的操作,以識別出哪里出了問題。 您可能只是發出了錯誤的命令。
JavaBenchmark $ 1.class是定義如下的匿名類:
new WindowAdapter(){public void windowClosing(WindowEvent we){System.exit(0);}}
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