Here’s a simple Java program that demonstrates how to take different types of user input using the Scanner class: import java.util.Scanner; // Step 1: Import the Scanner class public class UserInputExample { public static void main(String[] args) { // Step 2: Create a Scanner object ...
System.out.println("输入一个串并输出这个串的第二个字符"); String str3=input.nextLine(); System.out.println(str3.charAt(1));//这里注意输出串中第二个字符时用的是小括号而不是[] System.out.println("输入两个整数"); int a=input.nextInt(),b=input.nextInt(); System.out.printf("%d+%d...
Here, we are going to learn how to solve a common error encountered while trying to take input in various classes (using Scanner Class) in a Java program? Submitted by Saranjay Kumar, on March 18, 2020 Consider the following code,import java.util.*; public class test { public static ...
InputStreamReader (InputStream in, Charset cs)// 创建使用给定字符集的 InputStreamReader。 InputStreamReader (InputStream in, CharsetDecoder dec)// 创建使用给定字符集解码器的 InputStreamReader。 InputStreamReader (InputStream in, String charsetName)// 创建使用指定字符集的 InputStreamReader。 InputStre...
The findInLine(java.lang.String), findWithinHorizon(java.lang.String, int), and skip(java.util.regex.Pattern) methods operate independently of the delimiter pattern. These methods will attempt to match the specified pattern with no regard to delimiters in the input and thus can be used in spe...
Java 的四个输入法:BufferedReader、InputStreamReader、Scanner 和 System.in。 返回目录 1 System.in System.in 返回的是 InputStream 指向命令行输入的字节流,InputStream 的 read 方法以字节流的方式来读取命令行的输入的数据。 查看源码(InputStream.java)我们常用的有: ...
In the example below, we use different methods to read data of various types: Example importjava.util.Scanner;classMain{publicstaticvoidmain(String[]args){ScannermyObj=newScanner(System.in);System.out.println("Enter name, age and salary:");// String inputStringname=myObj.nextLine();// Nume...
The same output can be generated with this code, which uses a regular expression to parse all four tokens at once: <blockquote> text/java 複製 {@code String input = "1 fish 2 fish red fish blue fish"; Scanner s = new Scanner(input); s.findInLine("(\\d+) fish (\\d+) fish ...
1.你使用的是jdk1.4，Scanner是jdk1.5以后才有的 2.你没有导入这个类，import java.util.Scanner 是
Just because we have this variable "scan" that will take input does not mean that's all we need to be able to get some input. We have to make it accept some input. To do this, put this line of code right under the line where you create the variable scan: ...