Command Line Argument in Java - जावा में इनपुट लेने की एक विधि

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Command Line Argument in Java - जावा में इनपुट लेने की एक विधि
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Video Details
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After watching this video, You will learn……
What is command line argument in java with an example ?
How to work with command line arguments in java through program?
What are wrapper class and parse method in java with an example?
A complete program on command line arguments in java.
Practical live demo on the program for taking command line argument in java.
What is command line argument in java?

Command Line Argument : In this method we give input from command line, when we are going to execute the program at DOS command prompt. In this method we need to type cast the string argument in different data types. Because command line arguments are received in String and we can not use String in arithmetical operation. So we need to translate String in to corresponding data type.

Q. How to work with command line argument?
Ans.
class A
{

public static void main(String st[])
{
for(int i=0;----------;i++)
System.out.println("Value = "+st[i]);
int a,b,c;
a=Integer.parseInt(st[0]);
b=Integer.parseInt(st[1]);
c=a+b;
System.out.println("RESULT = "+c);
}
}

Q. What are wrapper class and parse method?
Ans.
int a=Integer.parseInt(st[0]);
Ex.
Float.parseFloat(String s) For float data type
Double.parseDouble(String s) For double data type
…………………. Similarly
For all data type