java scanner

掃描器類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()方法用于獲取此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()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• 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時可能會引發異常。 IllegalStateException ：如果不存在匹配結果，則可能引發此異常。

Syntax:

句法：

    public MatchResult match();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

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

該方法的返回類型為MatchResult ，它獲取上一次匹配操作的匹配結果。

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

輸出量

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

翻譯自: https://www.includehelp.com/java/scanner-match-method-with-example.aspx

java scanner