HELP ME PLEASEEEE

In java

Kisachek [45]

Answer:

import javax.swing.JPanel;

import javax.swing.JOptionPane;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JTextField;

import javax.swing.border.Border;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.Rectangle;

public class DrawingPanel{

private static final int width = 800;

private static final int heigth = 500;

private static JFrame mainFrame;

private static JPanel mainPanel, inputPanel, drawPanel;

private static JLabel xLabel, yLabel;

private static JTextField xField, yField;

private static JButton drawButton;

public static void main(String[] args)

{

mainFrame = new JFrame("Draw Path");

mainPanel = new JPanel(new BorderLayout());

inputPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));

xLabel = new JLabel("X Coordinate: ");

xField = new JTextField(5);

yLabel = new JLabel("Y Coordinate: ");

yField = new JTextField(5);

drawButton = new JButton("Draw");

inputPanel.add(xLabel);

inputPanel.add(xField);

inputPanel.add(yLabel);

inputPanel.add(yField);

inputPanel.add(drawButton);

Border border = BorderFactory.createLineBorder(Color.black);

drawPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));

drawPanel.setBorder(border);

mainPanel.add(inputPanel, BorderLayout.NORTH);

mainPanel.add(drawPanel, BorderLayout.CENTER);

mainFrame.add(mainPanel);

mainFrame.setSize(PANEL_WIDTH, PANEL_HEIGHT);

mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

mainFrame.setLocationRelativeTo(null);

mainFrame.setResizable(false);

mainFrame.setVisible(true);

// action listener for draw button

drawButton.addActionListener(new ActionListener() {

(use the at sign here)Override

public void actionPerformed(ActionEvent e) {

if(xField.getText().equals("") || yField.getText().equals(""))

JOptionPane.showMessageDialog(null, "Please enter the x and y coordinates!");

else

{

int x2 = Integer.parseInt(xField.getText().trim());

int y2 = Integer.parseInt(yField.getText().trim());

if(x2 > WIDTH || y2 > HEIGHT)

JOptionPane.showMessageDialog(null, "x and y coordinates should be less than "

+ width + " and " + height + " respectively!");

else

drawPath(x2, y2);

}

});

}

public static void drawPath(int x2, int y2)

{

int x1 = (int)drawPanel.getBounds().getCenterX();

int y1 = (int)drawPanel.getBounds().getCenterY();

Graphics g = drawPanel.getGraphics();

Rectangle r = drawPanel.getBounds();

g.setColor(drawPanel.getBackground());

g.fillRect(r.x, r.y, r.width, r.height);

g.setColor(Color. blue);

g.drawLine(x1, y1, x2, y2);

}

Explanation:

The class DrawingPanel is a Java class that gets the user input for the coordinate of a path with predetermined heigth and width (defined in the class). The methods of the class are; getGraphics(), getBounds(), getBackground(), setColor() and fillRect(). The result is a rectangular path GUI on the screen.

7 0

3 years ago

Dunbar's number, 150, refers to the number of:

Artyom0805 [142]

Answer:

Dunbar's number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships

Explanation:

I know this

6 0

2 years ago

Andy is trying to put together a holiday gift knapsack (with W=8) for Sarah. He has n items to choose from, each with infinitely

Sever21 [200]

Answer:

See explaination

Explanation:

Given 3 items: {w1 = 1, v1 = 3}, {w2 = 3, v2 = 2}, {w3 = 4, v3 = 3}

Hence OPT(1) = 3, OPT(3) = 2, OPT(4) = 3

Recursive formula for OPT(k) to minimize value is

OPT(k) = INFINITE if k <= 0

= min(3 + OPT(k-1), 2 + OPT(k-3), 3 + OPT(k-4))

Let us calculate OPT(1) to OPT(8)

OPT(1) = 3

OPT(2) = min ( 3 + OPT(1), 2 + OPT(-1), 3 + OPT(-2)) = 6

OPT(3) = 2

OPT(4) = 3

OPT(5) = min ( 3 + OPT(4), 2 + OPT(2), 3 + OPT(1)) = min(6, 8, 6) = 6

OPT(6) = min ( 3 + OPT(5), 2 + OPT(3), 3 + OPT(2)) = min(9, 4, 9) = 4

OPT(7) = min ( 3 + OPT(6), 2 + OPT(4), 3 + OPT(3)) = min(7, 5, 5) = 5

OPT(8) = min ( 3 + OPT(7), 2 + OPT(5), 3 + OPT(4)) = min(8, 8, 6) = 6

3 0

3 years ago

. Write programming code in C++ for school-based grading system

AleksAgata [21]

Explanation:

The grade must be calculated based on following pattern:

Average Mark RangeGrade91-100A181-90A271-80B161-70B251-60C141-50C233-40D21-32E10-20E2

Calculate Grade of Student in C++

To calculate grade of a student on the basis of total marks in C++ programming, you have to ask from user to enter marks obtained in 5 subjects. Now add marks of all the 5 subjects and divide it by 5 to get average mark. And based on this average mark, find grade as per the table given above:

// C++ Program to Find Grade of Student // -------codescracker.com------- #include<iostream> using namespace std; int main() { int i; float mark, sum=0, avg; cout<<"Enter Marks obtained in 5 Subjects: "; for(i=0; i<5; i++)

6 0

3 years ago

What type of function is being performed when a router screens packets based on information in the packet header

Helga [31]

Answer:

"Router screening" is the correct option.

Explanation:

A router that philters packets like a firewall. For certain instances, the whole firewall system is such a single scanning router.
Often connected to a network stage as well as a container-filter firewall has been the scanning router firewall. This rather firewall operates by filtering protocol characteristics from received packets.

So that the above seems to be the correct approach.

3 0

3 years ago