如果声明在print语句中？

How can I write an if statement inside the print statement?

如何在print语句中编写if语句？

public boolean checkEmpty()
{
    if(array.isEmpty)
    {
        Sytem.out.println("The List is empty");
    }
    else
    {
        System.out.println("The list has: " +  if(array.size() > 1)) {"Items"} + else {"item"} );
    }
}

1 个解决方案

#1

You can't write an if statement inside an expression like that.

你不能在这样的表达式中写一个if语句。

However, you can use Java's ternary operator ?: (scroll down about half way in the linked page) to embed a conditional expression:

但是，您可以使用Java的三元运算符？:(在链接页面中向下滚动一半）以嵌入条件表达式：

System.out.println("The list has: " +  ((array.size() > 1) ? "items" : "item"));

The format is:

格式为：

booleanCondition ? valueIfTrue : valueIfFalse

#1