java字符串反转函数reverse()的使用
StringBuffer result = new StringBuffer(); int n = s.length(); for (int i = 0; i < n; i++) { char temp = s.charAt(i); if (Character.isLetterOrDigit(temp)) { result.append(Character.toLowerCase(temp)); } } StringBuffer war = new StringBuffer(); war = result.reverse(); StringBuffer result1 = new StringBuffer(result).reverse(); System.out.println("result " + result); System.out.println("result1 " + result1); System.out.println("war " + war);
结果
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