java.lang.OutOfMemoryError..Help me

[kathir0301]

HI
I got the following exception when i tried to run the program..

public class Test {
public static void main(String[] args)throws Exception {

String rootPath = "C:/Documents and Settings/sample ArrayList<String> fileList = new ArrayList<String>();
sample ob=new sample();
fileList = ob.findAllfiles(rootPath);
System.out.println(fileList);
}
}
class sample
{
ArrayList<String> allFiles = new ArrayList<String>();

public ArrayList<String> findAllfiles(String rootPath)throws Exception
{

File dir = new File(rootPath);
if (!dir.isDirectory()) // check if it is a file
{
allFiles.add(rootPath);

}
if (dir.isDirectory() ) { // check if it is a directory
String files[] = dir.list();
for (int j = 0; j < files.length; j++)
{
allFiles.addAll(findAllfiles(rootPath + File.separator + files[j]));
}
}

return allFiles;
}
}



and the exception which i got is

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Unknown Source)
at java.lang.AbstractStringBuilder.expandCapacity(Unk nown Source)
at java.lang.AbstractStringBuilder.append(Unknown Source)
at java.lang.StringBuilder.append(Unknown Source)
at java.lang.StringBuilder.append(Unknown Source)
at java.util.AbstractCollection.toString(Unknown Source)
at java.lang.String.valueOf(Unknown Source)
at java.io.PrintStream.println(Unknown Source)
at Task.zip.main


pls help me to solve the problem...thanks in advance

[pbrockway2]

Spot the difference:

//allFiles.addAll(findAllfiles(rootPath + File.separator + files[j]));
findAllfiles(rootPath + File.separator + files[j]);

"allFiles.addAll(findAllFiles(..." will be continually adding the elements of allFiles, as returned by findAllFiles(), to itself. That way lies memory exhaustion.