java scanner字符串_Java Scanner toString()用法及代码示例

java.util.Scanner类的toString()方法返回此Scanner的字符串表示形式。未指定确切的格式。

用法:

public String toString()

返回值：此函数返回此扫描器的字符串表示形式。

以下示例程序旨在说明上述功能：

示例1:

// Java program to illustrate the

// toString() method of Scanner class in Java

import java.util.*;

public class GFG1 {

public static void main(String[] argv)

throws Exception

{

String s = "GeeksForGeeks - "

+ "A Computer Science Portal for Geeks";

// create a new scanner

// with the specified String Object

Scanner scanner = new Scanner(s);

// print a line of the scanner

System.out.println("Scanner String: \n"

+ scanner.nextLine());

// display information about this scanner

System.out.println("\nString representation "

+ "of this Scanner:\n"

+ scanner.toString());

// close the scanner

scanner.close();

}

}

输出：

Scanner String:

GeeksForGeeks - A Computer Science Portal for Geeks

String representation of this Scanner:

java.util.Scanner[delimiters=\p{javaWhitespace}+]

[position=51][match valid=true][need input=false]

[skipped=false][group separator=\,]

[decimal separator=\.][positive prefix=]

[negative prefix=\Q-\E][positive suffix=]

[negative suffix=][NaN string=\Q?\E][infinity string=\Q?\E]

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