java scanner

扫描器类match()方法 (Scanner Class match() method)

• match() method is available in java.util package.

  match()方法在java.util包中可用。

• match() method is used to get the MatchResult of the last scanning operation operated by this Scanner.

  match()方法用于获取此Scanner上次操作的MatchResult。

• match() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  match()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• match() method may throw an exception at the time of returning MatchResult. IllegalStateException: This exception may throw when none match result exists.

  match()方法在返回MatchResult时可能会引发异常。 IllegalStateException ：如果不存在匹配结果，则可能引发此异常。

Syntax:

句法：

    public MatchResult match();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is MatchResult, it gets match result for the last matching operation.

该方法的返回类型为MatchResult ，它获取上一次匹配操作的匹配结果。

Example:

例：

// Java program to demonstrate the example
// of MatchResult match() method of Scanner
import java.util.*;
public class MatchOfScanner {public static void main(String[] args) {String str = "Hi, [IncludeHelp] +\n 10.0 true ";
// Instantiates a Scanner object with
// the given string str
Scanner sc = new Scanner(str);
// Display str
System.out.println("sc.nextLine(): " + sc.nextLine());
// By using match() method is
// to match the last scanning
// operation performed by this Scanner
System.out.println("sc.match(): " + sc.match());
// By using close() method is to
// close the Scanner object
sc.close();
}
}

Output

输出量

sc.nextLine(): Hi, [IncludeHelp] +
sc.match(): [email protected]

翻译自: https://www.includehelp.com/java/scanner-match-method-with-example.aspx

java scanner