String[] and String

[skarosi]

Hi all,
I need to pass a String[] to a method(main(String args[]) but the variable i have is a String. how can i format it to b accepted?
i have tryed some ways but they didnt work
and i cant find anything on the API.
thanks

 

[Diancecht]

You usually don't invoke method main, it's invoekn when you execute java ClassName -parameter1 -parameter2.

Anyway, you can try

SomeClass.main(new String[]{yourString});

Cheers,

Dian

 

[skarosi]

this doesnt seem to work
when i call the method by:
MethodName(new String[] stringVariable);
i get an error:
array dimension missing

i even tried:

String[] variable = stringVariable;
i get:
incompatible types.
cheers

 

[venur]

Hi,

It should be MethodName(new String[]{stringVariable}); if stringVariable is already defined as String. if not it shouled be MethodName(new String[]{"stringVariable"});


Cheers
Venu

 

[bclt]

String [] args <==> String args[]

These are the same, whereas the syntax is different.
This as i see is in the main(), so after:
1. javac appName.java
2. java appName arg1 arg2

args[0] will have the String "arg1", and
args[1] will have the String "arg2"

This array is dynamically created.

String arrName[] = new String[30] //will initialize an array (String array) with indexes 0, 1, 2 ,...29
To set value: arrName[23] = "blablabla";

 

[Diancecht]

skarosi: maybe you should start from the beginning, telling us what you want to do and provide a code snippet.

Cheers,

Dian

 

[skarosi]

i thought that i did my self clear, but apparently not
ok, here it goes:
i have a method:

MethodName(String args[])
{...}

when i call this method, i call it with a String parameter:

Method2(){
  String stringVariable= "something i want to pass";
  MethodName(stringVariable);
}

This apparently doesnt work, cos one is String and the other String[]
i tried to create a new String[] variable and store stringvariable there but didnt work:

Method2(){
  String stringVariable= "something i want to pass";
  String stringArray[];
  stringArray[0]=stringVariable;  
  MethodName(stringArray);
}

and many other ways.
so, in other words, i want to pass a String variable to a methods that accepts String[].
is it possible?
cheers, Ilias

 

[uolj]

Your second attempt was almost correct. You didn't create the array, you just declared it. (Notice the new String[1] part.)

public class StringArrayTest {

	public static void main(String[] args) {
		
		String stringVariable = "Something to pass to the method.";
		String[] stringArray = new String[1];
		stringArray[0] = stringVariable;
		MethodTakingArray(stringArray);
	}

	static void MethodTakingArray(String args[]) {
		for (int i = 0; i < args.length; ++i)
			System.out.println(args[i]);
	}
}

 

[bclt]

Method2(){
  String stringVariable = new String("something i want to pass");
  MethodName(stringVariable);
}

 

[sedj]

Shouldn't it be :

MethodName(new String[] { "something" });

or :

String[] sArr = new String[1];
sArr[0] = "something";
MethodName(sArr);

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[skarosi]

that was great ppl! thanks a million
it was just the declaration of the size.
cheers

 

[Diancecht]

Glad you got it working.

Anyway, you must have been doing something wrong. You don't need to specify the size to build an String array.

Cheers,

Dian

 

[skarosi]

well thats what i was thinking as well, thats why i didnt specify the size,but qhen i did, it start working.
so i guess that was the problem.
thanks again

 

[bclt]

If only you had wasted one minute to look at my first post...

you'd have seen the first dynamic array; and the second example where I must and do specify the size.


-bclt