replace first character in string java code example

Example 1: replace character in string java

String str = ".............................."; 

        int index = 5; 
  
        char ch = '|'; 
 
        StringBuilder string = new StringBuilder(str); 
        string.setCharAt(index, ch); 

        System.out.println(string);

Example 2: replace everything before a character in java

result = result.split("\n")[0];

Example 3: java replaceall single character

.replaceAll("(?<!\\S)[^ ](?!\\S)", " ").trim()

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