java为什么三元表达式在if语句正常工作时不更新值？

Question

我还尝试更改三元表达式以产生等效结果：

是否平衡=（数学abs（左-右）<=1) ? 真：假

static boolean is_balanced=true;

public static int balHeight(Node node) {
   if(node==null) return 0;
   
   int lh  = balHeight(node.left);
   int rh  = balHeight(node.right);
   
  if(Math.abs(lh-rh)>1) is_balanced = false;
    **// ternary not working here
    // is_balanced = Math.abs(lh-rh) > 1 ? false:true;**
   
   return Math.max(lh,rh)+1;
}

Answer 1

等价的代码是is_balanced = Math.abs(lh - rh) > 1 ? false : is_balanced

（或者，没有三元：is_balanced = is_balanced && Math.abs(lh - rh) <= 1。）

Answer 2

下面是带三元和不带三元的示例代码，两者产生相同的结果。这意味着要按预期工作

public class Test {

  public static void main(String[] args) {
    int lh = 5;
    int rh = 10;
    boolean balanced;
    balanced = Math.abs(lh - rh) > 1;
    System.out.println("General Assignment - " + balanced);
    balanced = Math.abs(lh - rh) > 1 ? true : false;
    System.out.println("Ternary Assignment - " + balanced);
  }
}

输出-

General Assignment - true
Ternary Assignment - true