"Unable to resolve type" when trying to use the scanner
when I run the following code, it shows an error that the scanner cannot resolve for input. i have checked that jre is installed and version 1.7, what else do i need to check? please, help.
public class student {
String name;
int rollno;
public void get(String nm, int rno)
{ name=nm;
rollno=rno;
}
public void display()
{ System.out.println("Name of student is :" +name);
System.out.println("Roll no of student is :" +rollno);
}
public static void main(String args[])
{
int i ;
int r1;
String n1;
student obj[]= new student[10];
Scanner sc=new Scanner(System.in);
for(i=0;i<10;i++)
{
obj[i]= new student();
}
for(i=0;i<10; i++)
{ System.out.println("Enter name:");
n1=sc.next();
sc.nextLine();
System.out.println("Enter roll no :");
r1=sc.nextInt();
obj[i].get(n1,r1) ;
obj[i].display() ;
}
}
}
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4 answers
You also need to import the class itself. At the very top of the file, above public class student
, you need to add:
import java.util.Scanner;
Also, I would like to make some more possible fixes:
- Class names should be
PascalCase
- Your code should be consistently indented. Ctrl + Shift + F is your friend here.
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I tried the code myself and it works. Hence, this is a configuration issue. Since you were trying to import java.util.Scanner as suggested in hexafraction, I assume the JRE is not configured correctly.
Try:
- Right Click on your project name -> Click Properties -> Click Java Build Path
- Select the Libraries tab
- Click to add a class folder (on the right), then select your class.
Edit: Even if that doesn't fix the problem, copy the src folder to a new project, maybe solve your problem.
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