Java - Command Line Arguments
What will be the output of this program when run with no command line arguments?
public class Demo {
public static void main(String[] args) {
System.out.println(args.length);
}
}
What will be the output of this program when run with no command line arguments? public class Demo { public static void main(String[] args) { System.out.println(args.length); } }
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand args array when no arguments passed
If no arguments are passed, args is an empty array with length 0.Step 2: Print args.length
The program prints 0 because args.length is 0.Final Answer:
0 -> Option BQuick Check:
No arguments means args.length = 0 [OK]
Quick Trick: No args means args.length is zero, not null [OK]
Common Mistakes:
- Expecting null instead of empty array
- Thinking args.length is 1
- Expecting exception when no args
Master "Command Line Arguments" in Java
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