creating executable jar file for my java application

Question

public class createExcel {

public  void write() throws IOException, WriteException {

        WorkbookSettings wbSettings = new WorkbookSettings();
        wbSettings.setLocale(new Locale("en", "EN"));
        WritableWorkbook workbook1 =Workbook.createWorkbook(new File(file), wbSettings);
        workbook1.createSheet("Niru ", 0);
        WritableSheet excelSheet = workbook1.getSheet(0);
        createLabel(excelSheet);
        createContent(excelSheet,list);
        workbook1.write();
        workbook1.close();
    }


 public void createLabel(WritableSheet sheet)throws WriteException {

WritableFont times10pt = new WritableFont(WritableFont.createFont("D:\font\trebuct"),8);

// Define the cell format

        times = new WritableCellFormat(times10pt);
        // Lets automatically wrap the cells
        times.setWrap(false);
        WritableFont times10ptBoldUnderline = new WritableFont(
        WritableFont.createFont("D:\font\trebuct"), 9, WritableFont.BOLD, false,
        UnderlineStyle.NO_UNDERLINE);
        timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline);

        sheet.setColumnView(0,15);
                sheet.setColumnView(1,13);

        // Write a few headers
        addCaption(sheet, 0, 0, "Business Date");
        addCaption(sheet, 1, 0, "Dealer ID");


    }
        private void createContent(WritableSheet sheet, ArrayList list) throws WriteException,RowsExceededException {
                // Write a few number
        for (int i = 1; i < 11; i++) {
                    for(int j=0;j<11;j++){
            // First column
            addNumber(sheet, i, j,1);
            // Second column
            addNumber(sheet, 1, i, i * i);
                    }
        }
            }
private void addCaption(WritableSheet sheet, int column, int row, String s)     throws RowsExceededException, WriteException {

        Label label;
        label = new Label(column, row, s, timesBoldUnderline);
                sheet.addCell(label);
    }

    private void addNumber(WritableSheet sheet,  int row,int column,
            Integer integer) throws WriteException, RowsExceededException {
        Number number;
        number = new Number(column,row, integer, times);
        sheet.addCell(number);
    }


public static void main(String[] args) {

        JButton myButton0 = new JButton("Advice_Report");
        JButton myButton1 = new JButton("Position_Report");
        JPanel bottomPanel = new JPanel();   
        bottomPanel.add(myButton0);
        bottomPanel.add(myButton1);  
        myButton0.addActionListener(this);
        myButton1.addActionListener(this);  
        createExcel obj=new  createExcel();
        obj.setOutputFile("c;\\temp\\swings\\jack.xls");
        try{
        obj.write();
        }catch(Exception e){}
}

and so on. it working fine. i have jxl.jar and ojdbc14.jar files(need this jar file for Excelsheet creation and DB connection )and createExcel.class(.class file) file. how to make this code as executable jar file.

Answer 1

There are several ways:

1. Create a jar file and put your classes (without dependencies) there. Use some tool (any IDE has it) to do this and specify class with main function. You can also do it manually from command-line. When user want to run it he should specify classpath and all dependencies should be in that classpath.

2. Create the same jar and create .bat or .sh file in which set classpath and run your jar.

3. Create cross-platform installer with some special tool (but good tools aren't free).

Answer 2

You need to create a jar that contains your .class and a manifest file. I suggest you read http://java.sun.com/docs/books/tutorial/deployment/jar/manifestindex.html and post additional questions.

Answer 3

You create a JAR-file by executing following command:

jar -cvfm excel.jar MANIFEST.MF *.class

The MANIFEST.MF-file should contain following line:

Main-Class: createExcel

Answer 4

If what you're looking for is creating a .jar file, then you can use the "jar" command line tool. Here's its description and options/usage:

Usage: jar {ctxui}[vfm0Me] [jar-file] [manifest-file] [entry-point] [-C dir] files ...
Options:
    -c  create new archive
    -t  list table of contents for archive
    -x  extract named (or all) files from archive
    -u  update existing archive
    -v  generate verbose output on standard output
    -f  specify archive file name
    -m  include manifest information from specified manifest file
    -e  specify application entry point for stand-alone application
        bundled into an executable jar file
    -0  store only; use no ZIP compression
    -M  do not create a manifest file for the entries
    -i  generate index information for the specified jar files
    -C  change to the specified directory and include the following file
If any file is a directory then it is processed recursively.
The manifest file name, the archive file name and the entry point name are
specified in the same order as the 'm', 'f' and 'e' flags.

Example 1: to archive two class files into an archive called classes.jar:
       jar cvf classes.jar Foo.class Bar.class
Example 2: use an existing manifest file 'mymanifest' and archive all the
           files in the foo/ directory into 'classes.jar':
       jar cvfm classes.jar mymanifest -C foo/ .

I hope that helps.