//Tree Node,store information about fitness and Root Node of An individualclass Tree {        public TreeNode program;        double standardizedFitness;        double adjustedFitness;        double normalizedFitness;        int hits;        Tree(TreeNode p) {                program = (TreeNode)p.clone();                standardizedFitness = 0.0;                adjustedFitness = 0.0;                normalizedFitness = 0.0;                hits = 0;        }        Tree copy() {                Tree newInd = new Tree(this.program);                newInd.standardizedFitness = this.standardizedFitness;                newInd.adjustedFitness = this.adjustedFitness;                newInd.normalizedFitness = this.normalizedFitness;                newInd.hits = this.hits;                return newInd;        }}