I have to as the user for 3 strings and print out whether the first string concatenated with the second is equal to the third string

I have to as the user for 3 strings and print out whether the first string concatenated with the second is equal to the third string

public class ThreeStrings extends ConsoleProgram {

public void run()

{

String string1 = readLine("First string? ");

String string2 = readLine("Second string? ");

String string3 = readLine("Third String? ");

String combined = string1 + string2;


if(string3.equals("combined"))

{

 System.out.println(string1 + " + " + string2 " is equal to " + combined);

}

else

{

 System.out.println(string1 + " + " + string2 " is not equal to " + string3 + " ! ");

 }

 }

}

}