45 lines
1.3 KiB
Java
45 lines
1.3 KiB
Java
// strings/TestRegularExpression.java
|
|
// (c)2016 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
// Simple regular expression demonstration
|
|
// {java TestRegularExpression
|
|
// abcabcabcdefabc "abc+" "(abc)+" }
|
|
import java.util.regex.*;
|
|
|
|
public class TestRegularExpression {
|
|
public static void main(String[] args) {
|
|
if(args.length < 2) {
|
|
System.out.println(
|
|
"Usage:\njava TestRegularExpression " +
|
|
"characterSequence regularExpression+");
|
|
System.exit(0);
|
|
}
|
|
System.out.println("Input: \"" + args[0] + "\"");
|
|
for(String arg : args) {
|
|
System.out.println(
|
|
"Regular expression: \"" + arg + "\"");
|
|
Pattern p = Pattern.compile(arg);
|
|
Matcher m = p.matcher(args[0]);
|
|
while(m.find()) {
|
|
System.out.println(
|
|
"Match \"" + m.group() + "\" at positions " +
|
|
m.start() + "-" + (m.end() - 1));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Output:
|
|
Input: "abcabcabcdefabc"
|
|
Regular expression: "abcabcabcdefabc"
|
|
Match "abcabcabcdefabc" at positions 0-14
|
|
Regular expression: "abc+"
|
|
Match "abc" at positions 0-2
|
|
Match "abc" at positions 3-5
|
|
Match "abc" at positions 6-8
|
|
Match "abc" at positions 12-14
|
|
Regular expression: "(abc)+"
|
|
Match "abcabcabc" at positions 0-8
|
|
Match "abc" at positions 12-14
|
|
*/
|