Java is case sensitive so you can have two different variables in a program, one called xyz and another called XYZ. You can see what I mean in the example below:
andrew@UBUNTU:~/Java$ cat Case_Sensitive.java
class Case_Sensitive
{
public static void main(String args[])
{
int xyz = 123;
int XYZ = 234;
System.out.println("xyz = " + xyz);
System.out.println("XYZ = " + XYZ);
}
}
andrew@UBUNTU:~/Java$ javac Case_Sensitive.java
andrew@UBUNTU:~/Java$ java Case_Sensitive
xyz = 123
XYZ = 234
andrew@UBUNTU:~/Java$
