Java中的正则表达式“ $”（美元）元字符
子表达式/元字符“$”与行尾匹配。
例子1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class EndWith {
public static void main( String args[] ) {
String regex = "Nhooo$";
String input = "Hi how are you welcome to Nhooo";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
while(m.find()) {
count++;
System.out.println("Number of matches: "+count);
}
}
}输出结果
Number of matches: 1
例子2
以下Java程序从用户接受5个字符串，并打印以数字结尾的字符串。
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class EndingwithDigit {
public static void main( String args[] ) {
String regex = "^.*[0-9]$";
Scanner sc = new Scanner(System.in);
System.out.println("Enter 5 input strings: ");
String input[] = new String[5];
for (int i=0; i<5; i++) {
input[i] = sc.nextLine();
}
//创建一个Pattern对象
Pattern p = Pattern.compile(regex);
System.out.println("Strings ending with digits: ");
for(int i=0; i<5;i++) {
//创建一个Matcher对象
Matcher m = p.matcher(input[i]);
if(m.matches()) {
System.out.println(m.group());
}
}
}
}输出结果
Enter 5 input strings: sample string 1 sample string 2 test data hello 3264533 3546373 7653 Strings ending with digits: sample string 1 sample string 2 3264533 3546373 7653