Java中Pattern類的matchs(String,CharSequence)方法用於回答正則表達式在輸入上是否匹配。為此,我們編譯給定的正則表達式,並嘗試將給定的輸入與正則表達式進行匹配,其中正則表達式和輸入均作為參數傳遞給方法。如果要多次使用某個模式,則將其編譯一次並重新使用它將比每次調用此方法都更加有效。
用法:
public static boolean matches(String regex, CharSequence input)
參數:此方法接受兩個參數:
- regex:此參數表示要編譯的表達式。
- input:要匹配的字符序列。
返回值:此方法返回一個布爾值,回答正則表達式是否與輸入匹配。
以下示例程序旨在說明matchs(String,CharSequence)方法:
程序1:
// Java program to demonstrate
// Pattern.matches(String, CharSequence) method
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
// create a REGEX String
String REGEX = "(.*)(ee)(.*)?";
// create the string
// in which you want to search
String actualString
= "geeksforgeeks";
// use matches method to check the match
boolean matcher = Pattern.matches(REGEX, actualString);
// print values if match found
if (matcher) {
System.out.println("match found for Regex.");
}
else {
System.out.println("No match found for Regex.");
}
}
}
輸出:
match found for Regex.
程序2:
// Java program to demonstrate
// Pattern.matches(String, CharSequence) method
import java.util.regex.*;
public class GFG {
public static void main(String[] args)
{
// create a REGEX String
String REGEX = "(.*)(welcome)(.*)?";
// create the string
// in which you want to search
String actualString
= "The indian team wins worldcup";
// use matches() method to check the match
boolean matcher = Pattern.matches(REGEX, actualString);
// print values if match found
if (matcher) {
System.out.println("match found for Regex.");
}
else {
System.out.println("No match found for Regex.");
}
}
}
輸出:
No match found for Regex.
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注:本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 Pattern matches(String ,CharSequence) method in Java with Examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。