I have a question of the java code. I am currently using netbeans IDE8.2 and I p

Question

I have a question of the java code. I am currently using netbeans IDE8.2

and I put the code

package javaapplication1;

/**
*
* @author
*/
public class JavaApplication1 {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
  
double radius;
double PI = 3.14;
System.out.println("Enter the radius : ");
scanner input = new scanner(System.in);
radius = input.nextDouble();
if(radius <=0){
System.out.println("The value entered for radius is invalid. Please enter a positive interger");
} else{
double area = PI*radius*radius;
System.out.println("Area: "+ area);
}
}
}

After I run the code, it says that

Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - constructor scanner in class javaapplication1.scanner cannot be applied to given types;

required: no arguments

found: java.io.InputStream

reason: actual and formal argument lists differ in length

at javaapplication1.JavaApplication1.main(JavaApplication1.java:23)

C:UsershomeAppDataLocalNetBeansCache8.2executor-snippets un.xml:53: Java returned: 1

BUILD FAILED (total time: 5 seconds)

would u tell me how to fix?

Explanation / Answer

Hi

I have fixed the issue and highlighted the code changes below

JavaApplication1.java

import java.util.Scanner;

public class JavaApplication1 {

public static void main(String[] args) {
  
double radius;
double PI = 3.14;
System.out.println("Enter the radius : ");
Scanner input = new Scanner(System.in);
radius = input.nextDouble();
if(radius <=0){
System.out.println("The value entered for radius is invalid. Please enter a positive interger");
} else{
double area = PI*radius*radius;
System.out.println("Area: "+ area);
}
}
}

Output:

Enter the radius :
2.2
Area: 15.197600000000003

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