Java Scanner delimiter()方法及示例

java.util.Scanner 类的 delimiter() 方法返回该Scanner当前用于匹配分隔符的Pattern。

语法

public Pattern delimiter()

返回值： 该函数返回扫描仪的定界模式。

下面的程序说明了上述函数。

程序1 :

// Java program to illustrate the// delimiter() method of Scanner class in Java  import java.util.*;  public class GFG1 {    public static void main(String[] argv)        throws Exception    {          String s = "Geeksforgeeks has Scanner Class Methods";          // create a new scanner        // with the specified String Object        Scanner scanner = new Scanner(s);          // prints the next line of the string        System.out.println("Scanner String: \n"                           + scanner.nextLine());          // print the delimiter this scanner is using        System.out.println("\nDelimiter being used in Scanner: "                           + scanner.delimiter());          // Close the scanner        scanner.close();    }}

输出:

Scanner String: Geeksforgeeks has Scanner Class MethodsDelimiter being used in Scanner: \p{javaWhitespace}+

程序2

// Java program to illustrate the// delimiter() method of Scanner class in Java  import java.util.*;  public class GFG1 {    public static void main(String[] argv)        throws Exception    {          String s = "Geeksforgeeks.has.Scanner.Class.Methods";          // create a new scanner        // with the specified String Object        Scanner scanner = new Scanner(s);          // Set the delimiter to "."        scanner.useDelimiter(".");          // prints the next line of the string        System.out.println("Scanner String: \n"                           + scanner.nextLine());          // print the delimiter this scanner is using        System.out.println("\nDelimiter being used in Scanner: "                           + scanner.delimiter());          // Close the scanner        scanner.close();    }}

输出:

Scanner String: Geeksforgeeks.has.Scanner.Class.MethodsDelimiter being used in Scanner: .

**参考资料: ** https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#delimiter()