public class Demo {
public static void main(String[] args) {
String who = args[0];
String what = args[1];
System.out.println(who + " likes " + what + ".");
}
}
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at Demo.main(Demo.java:3)
There is an error like this, but I was trying to get a user input as a program argument, but when I searched for an error, I think this error appears beyond the allowable range of the array, but why is it like that?
java eclipse
The args of the main method is a variable that accepts the arguments that you put after the command when you run the Java program.
java MainTest a 1 b c 3 4 d f
For example, [a, 1, b, c, 3, 4, d, f] is assigned as args.
The exception to the code in the question occurred on the third line, right? That means nothing has been assigned to the args.
This is a problem caused by not passing any arguments when executing the java Demo command.
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