41 lines
1.2 KiB
Java
41 lines
1.2 KiB
Java
//: strings/TestRegularExpression.java
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// ©2015 MindView LLC: see Copyright.txt
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// Easily try out regular expressions.
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// {Args: abcabcabcdefabc "abc+" "(abc)+" "(abc){2,}" }
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import java.util.regex.*;
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import static com.mindviewinc.util.Print.*;
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public class TestRegularExpression {
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public static void main(String[] args) {
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if(args.length < 2) {
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print("Usage:\njava TestRegularExpression " +
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"characterSequence regularExpression+");
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System.exit(0);
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}
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print("Input: \"" + args[0] + "\"");
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for(String arg : args) {
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print("Regular expression: \"" + arg + "\"");
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Pattern p = Pattern.compile(arg);
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Matcher m = p.matcher(args[0]);
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while(m.find()) {
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print("Match \"" + m.group() + "\" at positions " +
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m.start() + "-" + (m.end() - 1));
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}
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}
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}
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} /* Output:
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Input: "abcabcabcdefabc"
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Regular expression: "abcabcabcdefabc"
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Match "abcabcabcdefabc" at positions 0-14
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Regular expression: "abc+"
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Match "abc" at positions 0-2
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Match "abc" at positions 3-5
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Match "abc" at positions 6-8
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Match "abc" at positions 12-14
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Regular expression: "(abc)+"
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Match "abcabcabc" at positions 0-8
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Match "abc" at positions 12-14
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Regular expression: "(abc){2,}"
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Match "abcabcabc" at positions 0-8
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*///:~
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