Java中的正则表达式\ t元字符
子表达式/元字符“\t”与制表符空间匹配。
例子1
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\\t";
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string: ");
String input = sc.nextLine();
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
while(m.find()) {
count ++;
}
System.out.println("Number of tab spaces: "+count);
}
}输出结果
Enter a string: This is a sentence with tab spaces Number of tab spaces: 6
例子2
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\\t";
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string: ");
String input = sc.nextLine();
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(input);
int count = 0;
String result = "";
while(m.find()) {
result = m.replaceAll(" ");
}
System.out.println("Result: "+result);
}
}输出结果
Enter a string: This is a sentence with tab spaces Result: This is a sentence with tab spaces