How can I Concatenate or Merge a string after another string in java? for example I have this first string:
String1="12345"
and this is second string:
String2="00000"
How to concatenate the second string after first string? Output is:
String3="1234500000"
You can use the + operator to concatenate them. Give your variables small first letters: string1
Plus operator for printing:
System.out.println(string1 + string2);
Or store in a third String (string3)
string3 = string1 + string2;
There is the string1.concat(string2) function, but if there is a Null value it will NPE. Furthermore, the concat() method only accepts String values while the + operator will silently convert the argument to a String (using the toString() method for objects)
See here for more on Concat and +
string3 will be string1 followed by string2 or as in your example "1234500000"You can also do the following:
String string1 = "12345";
String string2 = "00000";
string1 += string2;
System.out.println(string1);
By doing it this way, you can eliminate the string3 variable.
