class StringMemoryDemo
{
    /**
     * Method that tries to create the largest array
     * of String that will fit into the VM.
     * Can optionally call this routine with the specific
     * String to continually try to create.
     */
    public static void main( String [] args )
    {        
        String oneString = "Average Title (1995)";
        
        if( args.length == 1 )
            oneString = args[ 0 ];
            
        int low = 10000;
        int high = 100000000;
        
        while ( low <= high )
        {
            int mid = (low + high) / 2;
            
            try
            {
                test( oneString, mid );
                low = mid + 1;
            }
            catch( OutOfMemoryError e )
            {
                high = mid - 1;
            }
        }
        
        Runtime rt = Runtime.getRuntime( );        
        int vmsize = (int) rt.totalMemory( );
        
        System.out.println( "Virtual machine size: " + vmsize );
        System.out.println( "Each string length is: " + oneString.length( ) );
        System.out.println( "Able to create " + high + " strings" );
        System.out.println( "Avg cost per String (including 4 byte ref to it): "
                                    + vmsize / high + " bytes" );
    }
    
    public static void test( String theString, int numStrings )
    {
        String [] a = new String[ numStrings ];
        
        for( int i = 0; i < a.length; i++ )
            a[ i ] = new String( theString );
        
        a = null;    
    }
}