java - Should unnecessary elses be kept?

Question

If i have a simple chunk of code like:

public void tracePath(){
   int steps = 0;
   steps = bfs();       
   if(steps==0){
      pathFound(false);
      System.exit(0);
   }else{
      System.out.println(steps);
      pathFound(true);
      System.exit(0);
   }
}

AFAIK this could be rewriten without the else as

public void tracePath(){
   int steps = 0;
   steps = bfs();       
   if(steps==0){
      pathFound(false);
      System.exit(0);
   }
   System.out.println(steps);
   pathFound(true);
   System.exit(0);
}

Is there a performance (or other logical) reason so keep (or lose) the else? or is it just (in this example) stylistic choice?

Answer 1

在这种情况下，这是风格偏好，因为您在 if 语句的末尾退出。如果在 if 末尾没有 system.exit(0)，则在第二个示例中，您将执行两段代码。

Answer 2

我会把它改成这样：

public void tracePath(){
int steps = 0;
steps = bfs();       
pathFound((!(steps==0)));

System.exit(0);
}

Answer 3

我会稍微改变一下，这样：

public void tracePath(){
   int steps = 0;
   steps = bfs();       
   if(steps==0){
      pathFound(false);
   }else{
      System.out.println(steps);
      pathFound(true);
   }
   System.exit(0);
}

虽然，老实说，从被调用System.exit的函数调用tracePath看起来有点极端。