Thread: Read in arguments as a String

Hi I am a beginner in Java and need to read the arguments from command line into a String ignoring case.

I tried

String s = Arrays.toString(args);
    s = s.toLowerCase(); 
    System.out.print(s);

And for arguments abcd Abcd

It is printing out

[acbd, abcd]

Shouldn't it be printing out abcdabcd? I don't understand why it comes with square brackets. Can anyone explain it to me? Tks.

Arrays.toString is a method for visualising arrays, so the square brackets are there to show that it is an array.

Try and explain what it is exactly you want your code to do.

Rolf

I want to change the arguments from the command line to a single string with no upper case. For example, if args[0]= Hello and args[1]= World it would become a string= "hello world"

Try having a look at the javadoc for the String class and search for Java string concatenation on Google.

Rolf

Thanks, I wrote:

 String str = args.toString();
 
    String s = str.toLowerCase();
 
    System.out.print(s);

But now it is printing the address of s. I need to use method parseToString?

No, you have to iterate over args and concatenate them to one String.

I thought about it, but to concatenate I would need to know how many arguments the user set right? The idea would be a generalized code so arguments would become a single string regardless of how many arguments the user would set. Is there a way of concatenate as many arguments as the user set? I can't limit the number of arguments. Tks.

Have you ever read through the Basic Java tutorial? You can easily find out how many elements an array has.