find character in string java code example

Example 1: get certain character from string java

String words = "Hi There"; //creating a string var named 'words'
char index = words.charAt(0); /* setting a variable 'index' to letter
'0' of variable 'words'. In this case, index = 'H'.*/
System.out.println(index); //print var 'index' which will print "H"

Example 2: character at index of string java

String str = "Grepper";
char ch = str.charAt(0);
//ch is assigned the value of G

Example 3: java find all of letter in string

String stringName = "Hello";
String characterToFind = "l";
//This example will find all the Ls in this string and will print the index of
//it as soon as it is detected

for(int i = 0; i < stringName.length(); i++){
  if(stringName.substring(i, i+1).equals(characterToFind)){
    System.out.println(characterToFind + "found at " + i);
  }
  
}

Example 4: how to search for charecters in java

public class Test {
   public static void main(String args[]) {
      String str = new String("I81753490B9C/DQC");
      int index = str.indexOf('DQC');
      System.out.println("Index of the letter w :: "+index);
   }
}