java.util.Scanner.nextInt()%uA0方法扫描输入的下一个标记为int。形式nextInt()方法的调用和调用nextInt(radix)的行为方式完全相同,其中的radix是此扫描器的默认基数。
声明
以下是java.util.Scanner.nextInt()方法的声明
public int nextInt()
参数
-
NA
返回值
此方法返回从输入信息扫描的整型
异常
-
InputMismatchException%uA0-- 如果下一个标记不匹配的Integer正则表达式,或者是超出范围
-
NoSuchElementException%uA0-- 如果输入被耗尽
-
IllegalStateException%uA0-- 如果此scanner 已关闭
例子
下面的示例演示java.util.Scanner.nextInt()方法的用法。
package com.yiibai import java.util.* public class ScannerDemo { public static void main(String[] args) { String s = "Hello World! 3 + 3.0 = 6.0 true " // create a new scanner with the specified String Object Scanner scanner = new Scanner(s) // find the next int token and print it // loop for the whole scanner while (scanner.hasNext()) { // if the next is a int, print found and the int if (scanner.hasNextInt()) { System.out.println("Found :" + scanner.nextInt()) } // if no int is found, print "Not Found:" and the token System.out.println("Not Found :" + scanner.next()) } // close the scanner scanner.close() } }
让我们来编译和运行上面的程序,这将产生以下结果:
Not Found :Hello Not Found :World! Found :3 Not Found :+ Not Found :3.0 Not Found := Not Found :6.0 Not Found :true