copying from vector to array 2

[OhioSteve]

I normally work with asp.net, but I have been drafted to do some work on a java legacy app. I want to copy from a vector to an array. This is my code:

String[] myOutput = new String[myVector.size()];
myOutput = myVector.toArray(String[] myOutput);

The compiler says ".class expected" on the second line. Please advise.

 

[quarryknight]

In the toArray() method, you try to instantiate a new myOutput, when you defined it on the previous line.

Instead, it should be:
myOutput = myVector.toArray(myOutput);
Here is a test program I wrote that works.

import java.util.Vector;

public class Test
{
	public static void main(String args[])
	{
		Vector myVector = new Vector();
		String[] myOutput;
		
		for(int i = 0; i < 10; i++)
		{
			myVector.add(i + "");
		}

		myOutput = new String[myVector.size()];
		
		// You must cast the result into a String array, since it is currently
		// an array of objects.
		myOutput = (String[])myVector.toArray(myOutput);
		
		for(int j = 0; j < myOutput.length; j++)
		{
			System.out.println("Value " + j + ": " + myOutput[j]);
		}
		System.exit(0);
	}	
}

Nick Ruiz

http://www.DealMerchant.net

Webmaster, DBA

 

[OhioSteve]

Thanks for the quick response!

I tried your code and it worked. Then I tried to make my function match your suggestions. Unfortunately, the compiler still complained. I got this message:

alliedSales.java.204.incompatible types
found: java.lang.Object[]
required:java.lang.String[]
myOutput= myVector.toArray(myOutput);

Any suggestions?

 

[sedj]

You need to cast :

// You must cast the result into a String array, since it is currently
// an array of objects.
myOutput = (String[])myVector.toArray(myOutput);
[/code]

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[OhioSteve]

That worked!

 

[sedj]

OhioSteve : I think you gave the star to the wrong person - I only repeated what quarrynight said ... so here's a star quarrynight ... good post, thanks !

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