子表达式“ [] ”匹配括号中指定的所有字符。因此,要将所有大写字母移动到字符串的末尾-
遍历给定字符串中的所有字符。
使用正则表达式“ [AZ] ”匹配给定字符串中的所有大写字母。
将特殊字符和其余字符连接到两个不同的字符串。
最后,将特殊字符字符串连接到另一个字符串。
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); } }
输出结果
Result: sample text with upper case characters in betweenBCGLM
以下是Java程序,该程序使用Regex包的方法将字符串的大写字母移到其末尾。
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); //创建一个模式对象 Pattern pattern = Pattern.compile(regex); //匹配字符串中的已编译模式 Matcher matcher = pattern.matcher(input); //创建一个空的字符串缓冲区 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 ); } }
输出结果
Input string: sample B text C with G upper case LM characters in between Result: sample text with upper case characters in betweenBCGLM