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Replace Non ASCII Characters in a File

Replace Non ASCII Characters in a File ? package com.pukhraj.blog; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; public class ReplaceNonAsciiCharacters {     public static void main(String args[]) {         String inputFileName = "D:/input_file_name.txt";         String outputFileName = "D:/output_file_name.txt";         try {         // Read the content from the input file using BufferedReader object.             BufferedReader in = new BufferedReader(new FileReader(inputFileName));                         // Write the content to the output file using BufferedWriter object.             BufferedWriter out = new BufferedWriter(new FileWriter(outputFileName));         ...
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How to check a string starts with numeric number? String str = "123abcd"; boolean isStartWithDigit = Character.isDigit(s.charAt(0)); System.out.println("isStartWithDigit: "+isStartWithDigit); How to get first numeric value from a string in java?  Matcher matcher = Pattern.compile("\\d+").matcher(titleStr); if(matcher.find()) { System.out.println(matcher.group()); }; How to check if a String contains another String in a case insensitive manner in Java? Solution 1: String str = "I am Java Developer"; String test = "java"; Boolean bool = str.toLowerCase().contains(test.toLowerCase()); System.out.println(bool); Solution 2: org.apache.commons.lang3.StringUtils.containsIgnoreCase("AbBaCca", "bac"); Solution 3: Pattern.compile(Pattern.quote(s2), Pattern.CASE_INSENSITIVE).matcher(s1).find();
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