public void replaceFirst(String string) { System.out.println(string.replaceFirst("\\d{2}", "--")); System.out.println(string.replace("\\d{2}", "--")); System.out.println(string.replace("29", "--")); System.out.println(string.replaceAll("\\d{2}", "--")); } // year = ...
String str3 = str1.replaceAll("\\\n", "\n"); String str4 = str1.replaceAll("\\\n", "\\n"); String str5 = str1.replaceAll("\\\n", "\\\n"); String str6 = str1.replaceAll("\\\n", "\\\n"); System.out.println(str1); System.out.println("===3==="); System.ou...
1publicMatcherappendReplacement(StringBuffer sb, String replacement){23// If no match, return error4if(first <0)5thrownewIllegalStateException("No match available");67// Process substitution string to replace group references with groups8intcursor=0;9StringBuilderresult=newStringBuilder();1011while(c...
String str1="asdljbbabdjsfkaa3938bb";charc_low=str.charAt(0); System.out.println(c_low);charc_up=Character.toUpperCase(c_low); str=str.replaceFirst(String.valueOf(c_low), String.valueOf(c_up)); System.out.println(str);//使用String的replace(oldChar,newChar)str1=str1.replace('b'...
对于 Java 初学者， 对于 String 是不可变对象总是存有疑惑。例如如下代码：Strings="ABCabc";System....
// Program to replace the + characterclassMain{publicstaticvoidmain(String[] args){ String str1 ="+a-+b";// replace "+" with "#" using replaceAll()// need to escape "+" System.out.println(str1.replaceAll("\\+","#"));// #a-#b ...
18 if(found != string::npos)//its check until the 'n' of the occurence in the given string. 19 { 20 s1.replace(found, s2.length(), s3);//Replace the string using the replace() function 21 } 22 else 23 { 24 flag = false; ...
/** The value is used for character storage. */ private final char value[]; /** The offset is the first index of the storage that is used. */ private final int offset; /** The count is the number of characters in the String. */ ...
System.out.println("Hello".replace('4', 'J')); // Hello } } Run Code Note: If the character to be replaced is not in the string, replace() returns the original string. Example 2: Java String replace() Substrings class Main { public static void main(String[] args) { String ...
For such metacharacters, use a double backward slash (\\) to skip that meta character. Stringstring="how+to+do+in+java";StringupdatedString=string.replaceFirst("\\+","-");System.out.println(updatedString);//how-to+do+in+java 4. The‘null’is Not Allowed ...