about nextLine() in java

Question

I have that code I work on it and every think is fine until I wrote a String c = s.nextLine(); and it's not work he is sikp the enter from the user and go to next one and I don't know where is the problem maybe logic error or some think like this but until I delete a Line it's became next(); and it's work but if i want to be nextLine() what can i do ?and I would like to know why isn't work with me and work with me with another code?

so hear is the class redio

package radiotester;

public class Radio {
    private double frequency;
   private String channel;
   private int followers;

    public Radio() {
    frequency=0.0;
    channel="";
   followers=0;
    }

    public Radio(double frequency, String channel, int followers) {
        this.frequency = frequency;
        this.channel = channel;
        this.followers = followers;
    }
    
    public void printAll (){
    
    System.out.println("the frequency ="+frequency);
    System.out.println("the channel = "+channel);
    System.out.println("the followers = "+followers);
    }

    public void setFrequency(double f) {
        f = frequency;
    }

    public double getFrequency() {
        return frequency;
    }
   
}

and here is the test of class raido here is the problem

package radiotester;
import java.util.Scanner;
public class RadioTester {

    public static void main(String[] args) {
       Scanner s = new Scanner (System.in);
  Radio Radio1 = new Radio ();
  Radio1.printAll();
  
  
  System.out.println("plase give the raido requency");
  double r = s.nextDouble();
    
  
System.out.println("plase give the raido channle");
String c = s.next();
System.out.println("plase give the raido follwers");
int f = s.nextInt();
    Radio Radio2 = new Radio (r,c,f);
    
    System.out.println("old character of raido2");
    Radio2.printAll();
    Radio2.setFrequency(100.5);
        System.out.println("new character of raido2");
            Radio2.printAll();

    
}}