Remove Character from string in java

#1: Java Program to Remove all occurrences of a string  

1. package com.instanceofjava;
2.  
3. class RemoveCharString{
4.  
5. public static void main(String [] args){ 
6. 
   
7.   String str = "Java";
8.     str = str.replace("a", "");
9.     System.out.println(str);
10. }
11. }

Output:

1. Jv

#2: Java Program to Replace First occurance of Specific index char in a String

1. package com.injava;
2.  
3. class RemoveCharString{
4.  
5. public static void main(String [] args){ 
6. 
   
7.   String str = "Java";
8.  
9. //String result = str.substring(0, index) + str.substring(index+1);
10.  
11.   String result = str.substring(0, 1) + str.substring(1+1);
12.   System.out.println(result);
13.  
14. }
15. }

Output:

1. Jva

#3: Java Program to Remove all Numbers from a string.

1. package com.instanceofjava;
2.  
3. class RemoveNumberString{
4.  
5. public static void main(String [] args){ 
6. 
   
7.   String str = "Instance12ofjava143";
8.   str = str.replaceAll("[0-9]","")
9.   System.out.println(str);
10.  
11. }
12. }

Output:

1. Instanceofjava