Java中next()和nextLine()以及nextInt()的区别 。 而在这段代码sex=sc.nextLine().charAt(0);的前面刚好有age=sc.nextInt(); 也就是在输入sex的值时默认赋值为我输入age值之后的回车,因此一直输入错误...今天做一个学生信息录入系统的题目是遇到一个小问题,因此记录一下。 部分代码是这样的: String name;...
Understanding nextLine() Method Before we look into the issue with the nextLine() method, let us first understand the working of the nextLine() method. This method belongs to the java.util.Scanner class. Syntax: public String nextLine() This function prints the entire line except for the li...
请检查此问题：NoSuchElementException - class Scanner
The scanner does not advance past any input. Returns: true if and only if this scanner has another line of input Throws: IllegalStateException - if this scanner is closed nextLine public String nextLine() Advances this scanner past the current line and returns the input that was skipped. ...
Stringusername=scanner.nextLine(); System.out.println("Your username is"+username); 如果要对输入进行更多控制,也可以使用next(String pattern),或者仅验证username变量。 您可以在java.util.Scanner的API文档中找到有关其实现的更多信息。 相关讨论 可以说我只使用一次扫描器,并且不想通过初始化然后关闭扫描器来...
1、关于对象.nextLine();的使用 正确代码 错误代码 去掉scan.nextLine();在程序运行可能会出错。我还没输入第三个数据,程序就直接输出了,因为使用了 .nextLine(); 把回车键当成我所输入的内容给输出了。 用空格代替回车符的话…emmmm直接贴图 第三个数据最前面多了个空格。。。 所以还是要用scan.nextLine();来...
输入为:Gemin is a hardworking boy ! 输出为 使用next()方式接收: 输入的内容为 Gemin nextLine()方法演示 packagecom.Gemin.scanner;importjava.util.Scanner;publicclassDemo02{publicstaticvoidmain(String[] args){//创建一个扫描器对象,用于接收键盘数据Scanner scanner=newScanner(System.in); ...
Look for this old post (as mentioned earlier), which shows exactly what not to do. If you scroll down you find what the error is and can correct it. Note that method returns the first “nextLine” which does not consist wholly of whitespace. That is done with the trim() call. If ...
在日常业务开发中我们经常有可能读取一些自定义配置或者文件。比如说公私钥文件、一些固定的词典文件之类的...
publicvoidoutput(String filePath)throwsFileNotFoundException{ Scanner scanner=newScanner(newFile(filePath),"UTF-8");//Always explicitly pass a charset when working with textString str=null;while(scanner.hasNextLine()){ str=scanner.nextLine();if(str.indexOf("FileName")>0) ...