子表達式 “[ ]” 符合括號中指定的所有字元。因此,要將所有大寫字母移動到字串的末尾,需要執行以下步驟:
#遍歷給定字串中的所有字元。
使用正規表示式 "[A-Z]" 符合給定字串中的所有大寫字母。
將特殊字元和剩餘字元連接到兩個不同的字串。
最後,將特殊字元字串連接到另一個字串中。
public class RemovingSpecialCharacters { public static void main(String args[]) { String input = "sample B text C with G upper case LM characters in between"; String regex = "[A-Z]"; String specialChars = ""; String inputData = ""; for(int i=0; i< input.length(); i++) { char ch = input.charAt(i); if(String.valueOf(ch).matches(regex)) { specialChars = specialChars + ch; } else { inputData = inputData + ch; } } System.out.println("Result: "+inputData+specialChars); } }
Result: sample text with upper case characters in betweenBCGLM
以下是使用Regex 套件的方法將字串的大寫字母移到末尾的Java 程式。
import java.util.regex.Matcher; import java.util.regex.Pattern; public class Test { public static void main(String args[]) { String input = "sample B text C with G upper case LM characters in between"; String regex = "[A-Z]"; String specialChars = ""; System.out.println("Input string: \n"+input); //Creating a pattern object Pattern pattern = Pattern.compile(regex); //Matching the compiled pattern in the String Matcher matcher = pattern.matcher(input); //Creating an empty string buffer StringBuffer sb = new StringBuffer(); while (matcher.find()) { specialChars = specialChars+matcher.group(); matcher.appendReplacement(sb, ""); } matcher.appendTail(sb); System.out.println("Result: \n"+ sb.toString()+specialChars ); } }
Input string: sample B text C with G upper case LM characters in between Result: sample text with upper case characters in betweenBCGLM
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