Examples of java.util.regex.MatchResult.start()

java.util.regex.MatchResult.start()
Returns the start index of the match. @return The index of the first character matched @throws IllegalStateException If no match has yet been attempted, or if the previous match operation failed


        s = new Scanner("\u0085");
        result = s.nextLine();
        assertEquals("", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(1, matchResult.end());
        
        s = new Scanner("\u2028");
        result = s.nextLine();
        assertEquals("", result);

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        s = new Scanner("\u2028");
        result = s.nextLine();
        assertEquals("", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(1, matchResult.end());
        
        s = new Scanner("\u2029");
        result = s.nextLine();
        assertEquals("", result);

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        s = new Scanner("\u2029");
        result = s.nextLine();
        assertEquals("", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(1, matchResult.end());
        
        s = new Scanner("");
        try {
            result = s.nextLine();

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        s = new Scanner("Ttest");
        result = s.nextLine();
        assertEquals("Ttest", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(5, matchResult.end());


        s = new Scanner("\r\n");
        result = s.nextLine();
        assertEquals("", result);

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        s = new Scanner("\r\n");
        result = s.nextLine();
        assertEquals("", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(2, matchResult.end());


        char[] chars = new char[1024];
        Arrays.fill(chars, 'a');
        StringBuilder stringBuilder = new StringBuilder();

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        s = new Scanner(stringBuilder.toString());
        result = s.nextLine();


        assertEquals(stringBuilder.toString().substring(0, 1026), result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(1027, matchResult.end());


        chars = new char[1023];
        Arrays.fill(chars, 'a');
        stringBuilder = new StringBuilder();

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        s = new Scanner(stringBuilder.toString());
        result = s.nextLine();


        assertEquals(stringBuilder.toString().substring(0, 1023), result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(1025, matchResult.end());


        s = new Scanner("  ");
        result = s.nextLine();
        assertEquals("  ", result);

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        s = new Scanner("test\n\n\n");
        result = s.nextLine();
        assertEquals("test", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(5, matchResult.end());
        result = s.nextLine();
        matchResult = s.match();
        assertEquals(5, matchResult.start());
        assertEquals(6, matchResult.end());

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        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(5, matchResult.end());
        result = s.nextLine();
        matchResult = s.match();
        assertEquals(5, matchResult.start());
        assertEquals(6, matchResult.end());


        s = new Scanner("\n\n\n");
        result = s.nextLine();
        assertEquals("", result);

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        s = new Scanner("\n\n\n");
        result = s.nextLine();
        assertEquals("", result);
        matchResult = s.match();
        assertEquals(0, matchResult.start());
        assertEquals(1, matchResult.end());
        result = s.nextLine();
        matchResult = s.match();
        assertEquals(1, matchResult.start());
        assertEquals(2, matchResult.end());

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