java中scanner中nextint,Java Scanner nextInt()方法

Java Scanner nextInt()方法

java.util.Scanner.nextInt() 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。

1 语法

public int nextInt()

2 参数

无

3 返回值

此方法返回从输入信息扫描的整型。

4 示例

package com.yiidian;

/**

* 一点教程网： http://www.yiidian.com

*/

/**

* java.util.Scanner.nextInt()方法的例子

*/

import java.util.*;

public class Demo {

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();

}

}

输出结果为：

Not Found :Hello

Not Found :World!

Found :3

Not Found :+

Not Found :3.0

Not Found :=

Not Found :6.0

Not Found :true