Debutante en java

package projet1;

import java.util.Scanner;

public class chai {

 
    public static void main(String[] args) 
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("enter text: ");
        String str=sc.nextLine();
        System.out.println("le text saisi est: "+str);
    }
}

@SuppressWarnings("resource") // System resource should never be closed
Scanner sc = new Scanner(System.in);

Scanner sc = new Scanner(new File("toto.txt"));
...
sc.close(); // close file "toto.txt"

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