java 用Java打印用户输入？
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Printing user input in Java?
提问by Adz
Say I had the Scanner method, and I want to print the user input after that.
假设我有 Scanner 方法，然后我想打印用户输入。
Take this code for instance:
以这段代码为例：
String randomWords;
Scanner kb = new Scanner(System.in);
System.out.print("Please enter two words separated: ");
randomWords = kb.next();
System.out.println(randomWords);
And if the two separated words entered were
如果输入的两个分开的词是
hello world
Only
仅有的
hello
is printed
被打印
Why is this? and how can I print both of the words with the space included?
为什么是这样？以及如何打印包含空格的两个单词？
Thank you.
谢谢你。
回答by PermGenError
Use Scanner#nextLine() instead,
使用Scanner#nextLine() 代替，
This method returns the rest of the current line, excluding any line separator at the end.
此方法返回当前行的其余部分，不包括末尾的任何行分隔符。
randomWords = kb.nextLine();
Scanner#next()reads the next complete token basing on the delimiter.
Scanner#next()根据分隔符读取下一个完整的标记。
Finds and returns the next complete token from this scanner. A complete token is preceded and followed by input that matches the delimiter pattern
从此扫描器中查找并返回下一个完整的令牌。一个完整的标记前后是与分隔符模式匹配的输入
As default delimiter of the scanner is whitespace, you should explicitly define the delimiter for your scanner using Scanner#useDelimiter(str).
If you use \nnext line as delimiter your curretn code would work.
由于扫描仪的默认分隔符是whitespace，您应该使用Scanner#useDelimiter(str)为您的扫描仪明确定义分隔符。如果您使用\n下一行作为分隔符，您当前的代码将起作用。
Scanner kb = new Scanner(System.in).useDelimiter("\n");
System.out.print("Please enter two words separated: ");
randomWords = kb.next();
System.out.println(randomWords);
回答by Avinash Nair
public static void main(String[] args) {
String randomWords;
Scanner kb = new Scanner(System.in);
System.out.print("Please enter two words separated: ");
randomWords = kb.nextLine();
System.out.println(randomWords);
}
回答by Anthony Accioly
Use Scanner.nextLine()method to read up to the line break (noninclusive).
使用Scanner.nextLine()方法读取到换行符（非包含）。
randomWords = kb.nextLine();
