BalancedBinary

class Change{
int x;
Change(int m){
x=m;
}
}
public class BalancedBinary {

public static void main(String[] args) {
// TODO 自动生成的方法存根
TreeNode root=new TreeNode(3);
// int i=3;
Change change=new Change(0);
System.out.print(isBalanced(root));
}
public static boolean isBalanced(TreeNode root) {
        Change change=new Change(0);
return isBalanced(root,change);
}
public static  boolean isBalanced(TreeNode root,Change change) {
if(root==null){
change.x=0;
return true;
}
// int left,right;
Change change1=new Change(0);
Change change2=new Change(0);
if(isBalanced(root.left,change1)&&isBalanced(root.right,change2)){
int diff=change1.x-change2.x;
if(diff<=1&&diff>=-1){
change.x=1+(change1.x>change2.x?change1.x:change2.x);
return true;
}

}   
    return false;
}
}