Regular Expressions 101

Explanation

Pro

^start of line

interfacethe literal text interface (case sensitive)

\ba Unicode word boundary

.*any Unicode character (except for line terminators), repeated any number of times

Non-Capturing Group(?:\r?\n(?!=).*)*

*repeats the group contents below any number of times:

\r?optionally matches a carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Negative Lookahead(?!=)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

.*any Unicode character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^interface\b.*(?:\r?\n(?!=).*)*

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interface And

public void and(int, int);

public void nand(int, int);

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interface Or

public void or(int, int); public void nor(int, int);

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interface Xor

public void xor(int, int); public void xnor(int, int);

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interface Not

public void not(int);

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class BitWise extends And, Or, Xor, Not

// Implementation of the Interfaces goes here

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