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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ## 題1:寫一個函數,任意輸入一個字符串,如果兩個字符之間有多個空格字符,那么僅保留一個空格字符,例如“abc??? abc”,輸出“abc?abc”。 ~~~ /** * 返回一個字符串,將原有字符串中多個連續空格只保留一個 * @param s * @return */ public static String checkSpace (String s) { // \s 匹配的是任意的空白符,包括空格,制表符(Tab),換行符,中文全角空格 return s.replaceAll("\\s{1,}", " "); } ~~~ ## 題2:寫一個函數,輸出一個文件夾下所有文件的名稱 ~~~ /** * 輸出一個文件夾下所有的文件名稱 * @param path */ public static void outputFiles(String path) { File parent = new File(path); if(!parent.exists()) { System.out.println("path is not exist"); return; } File[] childs=parent.listFiles(); for(int i=0;i<childs.length;i++){ if(childs[i].isFile()){ System.out.println(childs[i].getName()); } } } ~~~ 本文將持續更新
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