使用 Java RegEx 将所有大写字母移至字符串末尾
子表达式 “[ ]” 匹配大括号中指定的所有字符。因此,若要将所有大写字母移动到字符串末尾 −
遍历给定字符串中的所有字符。
使用正则表达式 "[A-Z]" 匹配给定字符串中的所有大写字母。
将特殊字符和剩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。
示例 1
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
Result: sample text with upper case characters in betweenBCGLM
示例 2
以下是一段 Java 程序,它使用 Regex 包的方法将字符串中的大写字母移动到末尾。
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);
//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 );
}
}输出
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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