Java Scanner nextByte()方法

java.util.Scanner.nextByte(int radix) 方法扫描输入的下一个标记为一个字节。此方法将抛出InputMismatchException,如果如下文所述的下一个标记不能转换为有效的字节值。如果转换成功,则scanner执行匹配的输入。

1 语法

public byte nextByte(int radix)

2 参数

radix:基数用于将标记解释为一个字节值

3 返回值

此方法返回从输入信息扫描的byte值。

4 示例 

package com.yiidian;

/**
 * 一点教程网: http://www.yiidian.com
 */
/**
 * java.util.Scanner.nextByte(int radix)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 true";

        // create a new scanner with the specified String Object
        Scanner scanner = new Scanner(s);

        // find the next Byte token and print it
        // loop for the whole scanner
        while (scanner.hasNext()) {

            // if the next is byte with radix 7, print found and the byte
            if (scanner.hasNextByte()) {
                System.out.println("Found :" + scanner.nextByte(7));
            }

            // if a Byte is not 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 :=
Found :6
Not Found :true

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