Create an ArrayList of strings to store the names of celebrities and athletes. Add 5 names to the list. Process the list with a
for loop and the get() method to display the names, one name per line. Pass the list to a void method. Inside the method, insert another name at Index 2 and remove the name at index 4. Use a Foreach loop to display the arraylist again, all names on one line separated by asterisks. After the method call in main, create an iterator for the arraylist and use it to display the list one more time.
1 answer:
Answer:
// ArrayList class is imported
import java.util.ArrayList;
// Iterator class is imported
import java.util.Iterator;
// Main class is defined
class Main {
// main method to begin program execution
public static void main(String args[]) {
// names ArrayList of String is defined
ArrayList<String> names = new ArrayList<>();
// 5 names are added to the list
names.add("John");
names.add("Jonny");
names.add("James");
names.add("Joe");
names.add("Jolly");
// for loop to print the names inside the arraylist
for(int index = 0; index <names.size(); index++){
System.out.println(names.get(index));
}
// A blank line is printed
System.out.println();
// A newMethod is called with names as argument
newMethod(names);
// A blank line is printed
System.out.println();
// Instance of Iterator class is created on names
Iterator<String> iter
= names.iterator();
// Displaying the names after iterating
// through the list
while (iter.hasNext()) {
System.out.println(iter.next());
}
}
// the newmethod is created here
public static void newMethod(ArrayList<String> inputArray){
// A new name is added at index 2
inputArray.add(2, "Smith");
// the name in index 4 is removed
inputArray.remove(4);
// for each is used to loop the list and print
for (String name : inputArray) {
System.out.println(name);
}
}
}
Explanation:
The code is well commented. An output image is attached.
You might be interested in
Answer:
Check the explanation
Explanation:
//Define the class.
public class Loan implements java.io.Serializable {
//Define the variables.
private static final long serialVersionUID = 1L;
private double annualInterestRate;
private int numberOfYears;
private double loanAmount;
private java.util.Date loanDate;
//Define the default constructor.
public Loan() {
this(2.5, 1, 1000);
}
//Define the multi argument constructor.
protected Loan(double annualInterestRate, int numberOfYears,
double loanAmount) {
this.annualInterestRate = annualInterestRate;
this.numberOfYears = numberOfYears;
this.loanAmount = loanAmount;
loanDate = new java.util.Date();
}
//Define the getter and setter method.
public double getAnnualInterestRate() {
return annualInterestRate;
}
public void setAnnualInterestRate(double annualInterestRate) {
this.annualInterestRate = annualInterestRate;
}
public int getNumberOfYears() {
return numberOfYears;
}
public void setNumberOfYears(int numberOfYears) {
this.numberOfYears = numberOfYears;
}
public double getLoanAmount() {
return loanAmount;
}
public void setLoanAmount(double loanAmount) {
this.loanAmount = loanAmount;
}
//Define the method to compute the monthly payment.
public double getMonthlyPayment() {
double monthlyInterestRate = annualInterestRate / 1200;
double monthlyPayment = loanAmount * monthlyInterestRate / (1 -
(Math.pow(1 / (1 + monthlyInterestRate), numberOfYears * 12)));
return monthlyPayment;
}
//Define the method to get the total payment.
public double getTotalPayment() {
double totalPayment = getMonthlyPayment() * numberOfYears * 12;
return totalPayment;
}
public java.util.Date getLoanDate() {
return loanDate;
}
}
//Define the client class.
public class ClientLoan extends Application {
//Create the server object.
ServerLoan serverLoan;
//Declare the variables.
int y;
double r, a, mp=0, tp=0;
String result,d1;
//Create the button.
Button b = new Button("Submit");
//Define the method stage.
public void start(Stage primaryStage) throws Exception {
TimeZone.setDefault(TimeZone.getTimeZone("EST"));
TimeZone.getDefault();
d1 = "Server Started at " +new Date();
//Create the GUI.
Label l1=new Label("Annual Interest Rate");
Label l2 = new Label("Number Of Years:");
Label l3 = new Label("Loan Amount");
TextField t1=new TextField();
TextField t2=new TextField();
TextField t3=new TextField();
TextArea ta = new TextArea();
//Add the components in the gridpane.
GridPane root = new GridPane();
root.addRow(0, l1, t1);
root.addRow(1, l2, t2, b);
root.addRow(5,l3, t3);
root.addRow(6, ta);
//Add gridpane and text area to vbox.
VBox vb = new VBox(root, ta);
//Add vbox to the scene.
Scene scene=new Scene(vb,400,250);
//Add button click event.
b.setOnAction(value -> {
//Get the user input from the text field.
r = Double.parseDouble(t1.getText());
y = Integer.parseInt(t2.getText());
a = Double.parseDouble(t3.getText());
//Create the loan class object.
Loan obj = new Loan(r, y, a);
//Call the method to compute the results.
mp = obj.getMonthlyPayment();
tp = obj.getTotalPayment();
//Format the results.
result = "Annual Interest Rate: "+ r+"\n"+
"Number of Years: "+y+"\n"+
"Loan Amount: "+a+"\n"+
"monthlyPayment: "+mp+"\n"+
"totalPayment: "+tp;
//Add the result to the textarea.
ta.setText(result);
//Create an object of the server class.
serverLoan = new ServerLoan(this);
});
//Set the scene to the stage.
//Set the stage title.
//Make the scene visible.
primaryStage.setScene(scene);
primaryStage.setTitle("ClientLoan");
primaryStage.show();
}
//Define the main method lauch the application.
public static void main(String args[])
{
launch(args);
}
//Define the server class.
class ServerLoan extends Stage {
//Create the client loan object.
ClientLoan parent;
//Create the stage object.
Stage subStage;
//Create the text area.
TextArea ta = new TextArea();
//Define the constructor.
private ServerLoan(ClientLoan aThis) {
//Get the time in desired timezone.
TimeZone.setDefault(TimeZone.getTimeZone("EST"));
TimeZone.getDefault();
//Format the date with message.
String d2 = "Connected to client at " +new Date();
//Initialize the object.
parent = aThis;
//Add the date and the result to
//the text area.
ta.setText(d1);
ta.appendText("\n"+ d2);
ta.appendText("\n"+result);
//Create the grouppane.
GridPane root = new GridPane();
//Add text area to the group pane.
root.addRow(0, ta);
//Initialise the stage object.
subStage = new Stage();
//Add gridpane to the scene.
Scene scene = new Scene(root, 400, 200);
//Set the scene to the stage.
//Set the stage title.
//Make the scene visible.
subStage.setScene(scene);
subStage.setTitle("ServerLoan");
subStage.show();
}
}
}
Kindly check the Output in the attached image below.
