/*
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 * and open the template in the editor.
 */

package treedraw;

/**
 *
 * @author mute
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
                final int height = 9; //Tree height
        final int stemHeight = 2;
        //counters
        int count = 0;
        int whiteCount = 4;
        int drawCount = 1;
        int i;

        //Strings
        String drawSpace = "*";
        String whiteSpace = "    ";
        while ( count <= (height - 2) ) {

            while ( whiteCount >= 0 ) {

//              for ( i = whiteCount; i >= 0; i-- )  //This loop adjust the whiteSpace ' ' String
                                    whiteSpace = whiteSpace.substring( 1, (whiteSpace.length()));

                for ( i = drawCount; i >= 0; i--)  //This loop adjusts the drawSpace '*' String
                                    drawSpace += '*';
                System.out.println( whiteSpace + drawSpace + whiteSpace );
                drawCount++;  //iterates the counters
                whiteCount--;
                count++;

            }
                }
        while ( (count > ( height - 2 )) && (count < height ) ) {
            drawCount = 3;
            whiteCount = 3;
                        whiteSpace = " ";
                        drawSpace = "*";
            //Resused for loop to draw stem rather than just write the characters...could be methodized later
            for ( i = whiteCount; i >= 0; i-- )
                whiteSpace += ' ';
            for ( i = drawCount; i >= 0; i-- )
                    drawSpace += '*';
            for ( i = stemHeight; i >= 0; i--)
                System.out.println( whiteSpace + drawSpace + whiteSpace );
        }
    }
}


////////////
Throws this error.
////////////
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(String.java:1937)
        at treedraw.Main.main(Main.java:34)
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)