How avoid multiple IF loops in Java

This question already has an answer here:

Avoiding != null statements 58 answers

---

Use && . && is logical and. && combines two values and returns a boolean which is true if and only if both of its operands are true

if(address!=null && firstName!=null && lastName!=null)
{
}

For instance

boolean b;
b = 3 > 2 && 5 < 7; // b is true
b = 2 > 3 && 5 < 7; // b is now false

---

if loop is a wrong word. You should say if statements
As in you case you can use OR (||) or AND (&&)statement like this

if(address!=null && firstName!=null && lastName!=null)
{
}

Try AND(&&) if you want to pass all checks or intead of nested if statements and try OR(||) for non nested like else if or simply say if you want to pass anyone of your condition

But if all of these are Strings then you should try like this
"yourValue".equals(stringValue)
This will skip the null check.

---

Use and operator (&&)

   if(address!=null && firstName!=null && lastName!=null) 
    {
      //DoSomething here 
    }

And I suggest you to see Short circuit evaluation

链接地址: http://www.djcxy.com/p/13294.html

上一篇: 只有当它不为空时才有执行某个快捷方式的快捷方式？

下一篇: 如何避免Java中的多个IF循环