/** * <p>Repeat a String {@code repeat} times to form a * new String, with a String separator injected each time. </p> * * <pre> * StringUtils.repeat(null, null, 2) = null * StringUtils.repeat(null, "x", 2) = null * StringUtils.repeat("", null, 0) = "" * StringUtils.repeat("", "", 2) = "" * StringUtils.repeat("", "x", 3) = "xxx" * StringUtils.repeat("?", ", ", 3) = "?, ?, ?" * </pre> * * @param str the String to repeat, may be null * @param separator the String to inject, may be null * @param repeat number of times to repeat str, negative treated as zero * @return a new String consisting of the original String repeated, * {@code null} if null String input * @since 2.5 */ public static String repeat(final String str, final String separator, final int repeat) { if(str == null || separator == null) { return repeat(str, repeat); } // given that repeat(String, int) is quite optimized, better to rely on it than try and splice this into it final String result = repeat(str + separator, repeat); return removeEnd(result, separator); }
/** * <p>Repeat a String {@code repeat} times to form a * new String, with a String separator injected each time. </p> * * <pre> * StringUtils.repeat(null, null, 2) = null * StringUtils.repeat(null, "x", 2) = null * StringUtils.repeat("", null, 0) = "" * StringUtils.repeat("", "", 2) = "" * StringUtils.repeat("", "x", 3) = "xxx" * StringUtils.repeat("?", ", ", 3) = "?, ?, ?" * </pre> * * @param str the String to repeat, may be null * @param separator the String to inject, may be null * @param repeat number of times to repeat str, negative treated as zero * @return a new String consisting of the original String repeated, * {@code null} if null String input * @since 2.5 */ public static String repeat(final String str, final String separator, final int repeat) { if(str == null || separator == null) { return repeat(str, repeat); } // given that repeat(String, int) is quite optimized, better to rely on it than try and splice this into it final String result = repeat(str + separator, repeat); return removeEnd(result, separator); }
/** * <p>Repeat a String {@code repeat} times to form a * new String, with a String separator injected each time. </p> * * <pre> * StringUtils.repeat(null, null, 2) = null * StringUtils.repeat(null, "x", 2) = null * StringUtils.repeat("", null, 0) = "" * StringUtils.repeat("", "", 2) = "" * StringUtils.repeat("", "x", 3) = "xxx" * StringUtils.repeat("?", ", ", 3) = "?, ?, ?" * </pre> * * @param str the String to repeat, may be null * @param separator the String to inject, may be null * @param repeat number of times to repeat str, negative treated as zero * @return a new String consisting of the original String repeated, * {@code null} if null String input * @since 2.5 */ public static String repeat(final String str, final String separator, final int repeat) { if(str == null || separator == null) { return repeat(str, repeat); } // given that repeat(String, int) is quite optimized, better to rely on it than try and splice this into it final String result = repeat(str + separator, repeat); return removeEnd(result, separator); }
/** * <p>Repeat a String {@code repeat} times to form a * new String, with a String separator injected each time. </p> * * <pre> * StringUtils.repeat(null, null, 2) = null * StringUtils.repeat(null, "x", 2) = null * StringUtils.repeat("", null, 0) = "" * StringUtils.repeat("", "", 2) = "" * StringUtils.repeat("", "x", 3) = "xxx" * StringUtils.repeat("?", ", ", 3) = "?, ?, ?" * </pre> * * @param str the String to repeat, may be null * @param separator the String to inject, may be null * @param repeat number of times to repeat str, negative treated as zero * @return a new String consisting of the original String repeated, * {@code null} if null String input * @since 2.5 */ public static String repeat(final String str, final String separator, final int repeat) { if(str == null || separator == null) { return repeat(str, repeat); } // given that repeat(String, int) is quite optimized, better to rely on it than try and splice this into it final String result = repeat(str + separator, repeat); return removeEnd(result, separator); }