如何在 Java 的 Scanner 实用程序中将 Input 放在下一行
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How to put Input on next line in Java's Scanner utility
提问by VrnRap
I have a basic java question about the scanner utility. Let's say i have a simple program that takes the user input and stores it in a variable. My question is when i run the program that asks for multiple inputs, the cursor starts at the beginning of the question and not after it. My code is:
我有一个关于扫描仪实用程序的基本 Java 问题。假设我有一个简单的程序，它接受用户输入并将其存储在一个变量中。我的问题是当我运行要求多个输入的程序时，光标从问题的开头而不是之后开始。我的代码是：
public class question3 {
public static void main(String[] args){
Scanner s = new Scanner(System.in);
System.out.println("Enter the first number:");
Float a = s.nextFloat();
System.out.println("Enter the second number:");
Float b = s.nextFloat();
System.out.println("Sum = " + (a+b));
System.out.println("Difference = " + (a-b));
System.out.println("Product = " + (a*b));
}
}
When I run this program it will look like Enter First Number then i type the number, and then |Enter Second Number. "|" meaning where the blinking cursor is. When I type it'll show up underneath, but it could confuse the user so I was wondering what the solution could be.
当我运行这个程序时，它看起来像输入第一个数字，然后我输入数字，然后|输入第二个数字。“|” 意思是闪烁的光标所在的位置。当我输入时，它会显示在下面，但它可能会使用户感到困惑，所以我想知道解决方案是什么。
It is an IDE problem, since nothing else is wrong with the code.
这是一个IDE问题，因为代码没有其他问题。
采纳答案by Josh M
Instead of println(String)before each input, change it to print(String). So it would look something like this:
而不是println(String)在每个输入之前，将其更改为print(String). 所以它看起来像这样：
public class question3{
public static void main(String[] args){
Scanner s = new Scanner(System.in);
System.out.print("Enter the first number:");
Float a = s.nextFloat();
System.out.print("Enter the second number:");
Float b = s.nextFloat();
System.out.println("Sum = " + (a+b));
System.out.println("Difference = " + (a-b));
System.out.println("Product = " + (a*b));
}
}
Also, just a note, you should use proper/appropriate naming conventions for your variables. Like for your Scanner, you should call it readeror input; something which represents its function. The same idea goes for the rest of your variables. Also, class names start with a capital.
另外，请注意，您应该为变量使用正确/适当的命名约定。就像你的一样Scanner，你应该称它为reader或input；代表其功能的东西。同样的想法也适用于您的其余变量。此外，类名以大写开头。
Here is what the finished result looks like:
最终结果如下所示：
回答by ug_
System.out.println prints out string then a new line, so your input is being placed on a new line. Try making it read
System.out.println 打印出字符串，然后是一个新行，因此您的输入被放置在一个新行上。尝试让它阅读
System.out.print("Enter the first number:");
Float a = s.nextFloat();
System.out.println();
System.out.print("Enter the second number:");
Float b = s.nextFloat();
System.out.println();
回答by LeandreM
This can save you some seconds, by typing few lines:
通过输入几行，这可以为您节省几秒钟：
System.out.print("Enter the first number:");
Float a = s.nextFloat();
System.out.print("\nEnter the second number:");
Float b = s.nextFloat();
System.out.println("\nSum = " + (a+b)
+"\nDifference = " + (a-b)
+"\nProduct = " + (a*b));
