输入完可以不用for循环 import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 int n = in.nextInt(); int[] a = new int...
public class Test4 { public static void main(String[] args) { // 定义一个字符串 String s1 = "abc"; // 将字符串转换成字节数组.a的字节值为97 byte[] bys = s1.getBytes(); for (int i = 0; i < bys.length; i++) { System.out.println(bys[i]); } System.out.println("---"...
For example, this code allows a user to read a number from System.in: <blockquote>text/java 复制 {@code Scanner sc = new Scanner(System.in); int i = sc.nextInt(); } </blockquote> As another example, this code allows long types to be assigned from entries in a file myNumbers:...
import java.util.Scanner; class zhezhi { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int x=sc.nextInt(); int y =0; if(x>=3){ y=2 * x + 1; System.out.println(y); }else if(-1<x&x<3){ y = 2 * x; System.out.println(y); }else ...
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("请输入字符数组的长度:"); int length = scanner.nextInt(); char[] charArray = new char[length]; for (int i = 0; i < length; i++)...
Class declarationFollowing is the declaration for java.util.Scanner class −public final class Scanner extends Object implements Iterator<String> Learn Java in-depth with real-world projects through our Java certification course. Enroll and become a certified expert to boost your career....
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("请输入数组的长度:"); int length = scanner.nextInt(); int[] array = new int[length]; ...
import java.util.Scanner; class Main { public static void main(String[] args) { Scanner myObj = new Scanner(System.in); System.out.println("Enter name, age and salary:"); // String input String name = myObj.nextLine(); // Numerical input int age = myObj.nextInt(); double salary...
Both hasNext and next methods may block waiting for further input. Whether a hasNext method blocks has no connection to whether or not its associated next method will block. The findInLine(java.lang.String), findWithinHorizon(java.lang.String, int), and skip(java.util.regex.Pattern) methods...
```java import java.util.Scanner; public class EvenNumbers { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("请输入一个整数N:"); int N = scanner.nextInt(); for (int i = 1; i <= N; i++) { ...