without supplying command line arguments

**r035198x** · Mar 9 '07, 12:29 PM

Originally posted by shana07

Friends, I wish to consult about this big arithmetic program.
This program basically is calculating big numbers. It work great from command prompt, for instance: java bigal 999999999999999 99 + 5.
Is this program works without supplying command line arguments?
If possible then please guide me how to get it to work...really appreciate any help. many thanks.....

Code:

public static void main(String[] args) 
{
jonelo.sugar.util.GeneralProgram.requiresMinimumJavaVersion("1.3.1");
try {
new Main(args);
} catch (BigAlException e) 
{
System.err.println(e.getMessage());
System.exit(1);
}
}

an excerpt from the Main method ....

Code:

public Main(String[] args) throws BigAlException 
{
 
if (args.length < 1) {
printHelpShort();
return;
}
 
if (args.length < 2) {
if (args[0].equalsIgnoreCase("help") || args[0].equalsIgnoreCase("-h"))
printHelpLong("/help/bigal/help_en.txt"); else
if (args[0].equalsIgnoreCase("hilfe"))
printHelpLong("/help/bigal/help_de.txt"); else
printHelpShort();
return;
}
 
// operation valid?
int opcode = receiveOperation(args[1]);
if (opcode==UNKNOWN) throw new BigAlException("invalid operation");
 
// general init
BigInteger b1=null, b2=null, b3=null;
BigDecimal d1=null, d2=null, d3=null;
String out="";
// default init values for fibonacci
int fibseed0=0;
int fibseed1=1;
 
// 2nd number required?
if (!isSingleOperation(opcode)) {
if (args.length < 3) {
throw new BigAlException("This operation requires a 2nd number!");
}
if (isDecimalOperation(opcode))
d2 = receiveDecNumber(args[2]); else
b2 = receiveNumber(args[2]);
}
 
if (isDecimalOperation(opcode))
d1 = receiveDecNumber(args[0]); else
b1 = receiveNumber(args[0]);
 
// remember the counter
long begin = System.currentTimeMillis();
switch (opcode) {
case ADD: out=toString(d1.add(d2));
break;
case SUB: out=toString(d1.subtract(d2));
break;
case MUL: out=toString(d1.multiply(d2));
break;
case DIV:

Create your own array of String args and pass it here:

Code:

 new Main(args);

Replace args with your array of arguments.

**shana07** · Mar 9 '07, 03:36 PM

Originally posted by r035198x

Create your own array of String args and pass it here:

Code:

 new Main(args);

Replace args with your array of arguments.

I put this code in main and compile, but no output is given.something wrong in my input parameter then...?

Code:

try 
        {
            String[] arrayArgs = new String[] { "55555" + "6" };

            new Main(arrayArgs);
        } catch (BigAlException e)

**horace1** · Mar 9 '07, 05:13 PM

your string initialisation { "55555" + "6" } concatenates to a single string {"555556"}
try initialising the array so

Code:

try 
        {
            String[] arrayArgs = { "55555", "+", "6" };
            new Main(arrayArgs);
        } catch (BigAlException e)

**horace1** · Mar 9 '07, 08:22 PM

you could also enter your input using a JOptionPane and split the returned string, e.g.

Code:

    try 
        {
            String str = JOptionPane.showInputDialog(null,"enter expression ");
            String[] arrayArgs = str.split(" ");
            Main(arrayArgs);
        } catch (Exception e){}

**shana07** · Mar 10 '07, 03:34 PM

Originally posted by horace1

your string initialisation { "55555" + "6" } concatenates to a single string {"555556"}
try initialising the array so

Code:

try 
        {
            String[] arrayArgs = { "55555", "+", "6" };
            new Main(arrayArgs);
        } catch (BigAlException e)

Thanks for your help..This one also not giving any output.
I don't know what else should I put to get output.
What kind of arguments that I need to put because the arguments then need to be passed to receiveoperatio n method. I put again main and receiveOperatio n here for reference...kin dly advise.

Code:

public Main(String[] args) throws BigAlException 
    {

        if (args.length < 1) {
            printHelpShort();
            return;
        }

        if (args.length < 2) {
            if (args[0].equalsIgnoreCase("help") || args[0].equalsIgnoreCase("-h"))
                printHelpLong("/help/bigal/help_en.txt"); else
            if (args[0].equalsIgnoreCase("hilfe"))
                printHelpLong("/help/bigal/help_de.txt"); else
            printHelpShort();
            return;
        }

        // operation valid?
        int opcode = receiveOperation(args[1]);
        if (opcode==UNKNOWN) throw new BigAlException("invalid operation");

Code:

private static final int receiveOperation(String operation) {
        int opcode = UNKNOWN;
        operation=operation.toLowerCase();
        if (operation.equals("add") || operation.equals("+"))
            opcode = ADD; else
        if (operation.equals("sub") || operation.equals("-"))
            opcode = SUB; else
        if (operation.equals("mul") || operation.equals("*") || operation.equals("x") )
            opcode = MUL; else
        if (operation.equals("div") || operation.equals("/") || operation.equals(":") )
            opcode = DIV; else
        if (operation.equals("divide") || operation.equals("//") || operation.equals("::") )
            opcode = DIVIDE; else
        if (operation.equals("mod") || operation.equals("%"))
            opcode = MOD; else
        if (operation.equals("fib") || operation.equals("fibonacci"))
            opcode = FIB; else
        if (operation.equals("luc") || operation.equals("lucas"))
            opcode = LUC; else
        if (operation.equals("nk") || operation.equals("choose"))

**shana07** · Mar 14 '07, 02:36 PM

Originally posted by horace1

your string initialisation { "55555" + "6" } concatenates to a single string {"555556"}
try initialising the array so

Code:

try 
        {
            String[] arrayArgs = { "55555", "+", "6" };
            new Main(arrayArgs);
        } catch (BigAlException e)

Sorry, I've made wrong.
This one works! Thanks to you...
I understand about String now.

without supplying command line arguments

without supplying command line arguments

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