Learn to write a java program to remove all the white spaces from a given string using regular expression (“\\s”) and isWhitespace() method. Learn to write a Java program toremove all the white spaces and non-visible charactersfrom a givenstring. It may not be needed in real world a...
**/publicclassRemoveWhitespace{publicstaticvoidmain(String[] args){Strings="He ll o, Wor ld !";//1.正则表达式方式:"\s"匹配任何不可见字符,包括空格,制表符,换页符等System.out.println(s.replaceAll("\\s+",""));//2.自定义方法System.out.println(trimAllWhitespace(s)); }publicstaticStringtri...
public static String removeWhiteSpaces(String str){ String s = ""; char[] arr = str.toCharArray(); for (int i = 0; i < arr.length; i++) { int temp = arr[i]; if(temp != 32 && temp != 9) { // 32 ASCII for space and 9 is for Tab s += arr[i]; } } return s; ...
在这个例子中,removeNonAlphabets方法接收一个字符串数组作为输入,并返回一个新的字符串数组,其中所有非字母字符都被删除了。这是通过使用String类的replaceAll方法实现的,该方法使用正则表达式[^a-zA-Z]来匹配所有非字母字符,并将它们替换为空字符串。 应用场景 ...
StringUtils.replaceEach("abcde", new String[]{"ab", "d"}, new String[]{"w", "t"});//---"wcte"(多组指定替换ab->w,d->t) //重复字符 StringUtils.repeat(‘e‘, 3);//---"eee" //反转字符串 StringUtils.reverse("bat");//---"tab" //删除某字符 StringUtils.remove("queued",‘...
if ((Character.isWhitespace(str.charAt(i)) == false)) { return false; } } return true; } // isNotEmpty public static boolean isNotEmpty(String str) { return !StringUtils.isEmpty(str); } // isNotBlank public static boolean isNotBlank(String str) { ...
2. Remove the Trailing Whitespaces 2.1. UsingString.stripTrailing() ThestripTrailing()method returns a string with all trailing white space removed. StringblogName=" how to do in java ";StringstrippedTrailingWhitespaces=blogName.stripTrailing();Assertions.assertEquals(strippedTrailingWhitespaces,"how ...
public static String deleteWhitespace(String str) 删除空格 这个方法还挺管用的。比trim给力 StringUtils.deleteWhitespace(null) = nullStringUtils.deleteWhitespace("") = ""StringUtils.deleteWhitespace("abc") = "abc"StringUtils.deleteWhitespace(" ab c ") = "abc" ...
static booleanisBlank(java.lang.String pStr) Return true if pStr is null, the empty string, or consists entirely of whitespace where whitespace is defined by the String.trim method. static booleanisEmpty(java.lang.String pStr) Return true if pStr is null or has length zero. ...
^is for negation, so all these expressions will be whitelisted This expression will only keep letters, numbers, punctuation, and whitespace.We can customize the expression as we want to allow or remove more character types We can also useString.replaceAll()with the same regex: ...