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3 years ago

Select the two statements below that are true. Press on the info button for

Computers and Technology

1 answer:

bulgar [2K]3 years ago

4 0

Answer:

The command print must be in lower case.

To show a variable or a number you do not need quotation marks.

Explanation:

print("string here")

strings can be created with single or double quotes

print(3+5) returns 8

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Create a GUI application that allows the user to select a rate category (from a set of radio buttons), and enter the number of m

aniked [119]

Answer:

Kindly note that, you're to replace "at" with shift 2 as the brainly text editor can't take the symbol

Explanation:

Below is the Java Swing implementation of the assignment.

=========================== LongDistance.java ====================================

import java.awt.GridLayout;

import javax.swing.*;

public class LongDistance extends JFrame{

/**

public static float rate;

public static float minutes;

public static float total;

LongDistance(){

RatePanel rp = new RatePanel();

MinutesPanel mp = new MinutesPanel();

ButtonsPanel bp = new ButtonsPanel();

this.setLayout(new GridLayout(3, 1));

this.add(rp);

this.add(mp);

this.add(bp);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.setSize(250, 250);

this.setVisible(true);

}

============================ RatePanel.java ==================================

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.ButtonGroup;

import javax.swing.JPanel;

import javax.swing.JRadioButton;

import javax.swing.border.Border;

public class RatePanel extends JPanel implements ActionListener {

/**

private JRadioButton jr1, jr2, jr3;

RatePanel(){

Border panelBorder = BorderFactory.createTitledBorder("Select a Rate Category");

jr1 = new JRadioButton("Daytime ($0.7) per minute");

jr2 = new JRadioButton("Evening ($0.12) per minute");

jr3 = new JRadioButton("Off-Peak ($0.05) per minute");

ButtonGroup bg = new ButtonGroup();

this.setLayout(new GridLayout(3,1));

this.setBorder(panelBorder);

this.setPreferredSize(new Dimension(800, 150));

this.add(jr1);

this.add(jr2);

this.add(jr3);

bg.add(jr1);

bg.add(jr2);

bg.add(jr3);

jr1.addActionListener(this);

jr2.addActionListener(this);

jr3.addActionListener(this);

}

"at"Override

public void actionPerformed(ActionEvent arg0) {

// TODO Auto-generated method stub

if(arg0.getSource() == jr1){

LongDistance.rate = 0.07f;

}

if(arg0.getSource() == jr2){

LongDistance.rate = 0.12f;

}

if(arg0.getSource() == jr3){

LongDistance.rate = 0.05f;

}

=============================== MinutesPanel.java =============================

import java.awt.Dimension;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import javax.swing.*;

import javax.swing.border.Border;

import javax.swing.event.DocumentListener;

public class MinutesPanel extends JPanel implements KeyListener{

JTextField jt;

MinutesPanel(){

Border panelBorder = BorderFactory.createTitledBorder("Time Of Call");

this.setLayout(new GridLayout(1, 2));

JLabel jl = new JLabel("Minutes: ");

jt = new JTextField();

jt.setBounds(50,50,150,20);

this.setPreferredSize(new Dimension(10, 10));

this.setBorder(panelBorder);

this.add(jl);

this.add(jt);

jt.addKeyListener(this);

}

"at"Override

public void keyPressed(KeyEvent arg0) {

// TODO Auto-generated method stub

}

"at"Override

public void keyReleased(KeyEvent arg0) {

// TODO Auto-generated method stub

if(jt.getText() != "")

LongDistance.minutes = Float.parseFloat(jt.getText());

}

"at"Override

public void keyTyped(KeyEvent arg0) {

// TODO Auto-generated method stub

}

============================= ButtonsPanel.java ============================

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

public class ButtonsPanel extends JPanel implements ActionListener{

JButton calculate;

JButton exit;

ButtonsPanel(){

calculate = new JButton("Calculate Charges");

exit = new JButton("Exit");

this.add(calculate);

this.add(exit);

calculate.addActionListener(this);

exit.addActionListener(this);

}

"at"Override

public void actionPerformed(ActionEvent arg0) {

// TODO Auto-generated method stub

if(arg0.getSource() == calculate){

System.out.println("r " + LongDistance.rate);

System.out.println("m " + LongDistance.minutes);

LongDistance.total = LongDistance.rate * LongDistance.minutes;

JOptionPane.showMessageDialog(null, "Total Charges: " +LongDistance.total);

}

if(arg0.getSource() == exit){

System.exit(0);

}

============================ App.java==============================

public class App {

public static void main(String[] args) {

LongDistance ld = new LongDistance();

}

Check the output below

6 0

4 years ago

Convert the decimal number -12 to hexadecimal (2's complement)

Helga [31]

Answer:

FFF4

Explanation:

Binary representation of 12 = 00001100

Expressing it in hexadecimal format : 0C

Binary representation of -12:

Step 1 : Computing 1's complement for 12 =11110011

Step 2 : Adding 1 to 1's complement to get the 2's complement =>

11110011+1 = 11110100

Converting the 2's complement representation to hexadecimal format:

F4 ( 8 bit representation) or FFF4 ( 16 bit representation)

4 0

4 years ago

This algorithm requires you to find the perimeter of 12 different squares.

k0ka [10]

Answer:

BEGIN

SET count = 1

WHILE count <= 12 THEN

INPUT length

perimeter = length * length

PRINT perimeter

END WHILE

END

Explanation:

You can also set count to 0 and in while loop use count < 12 to loop just 12 times just as above

4 0

3 years ago

Is Brainly cheating??

Vanyuwa [196]

Answer: What do you mean?

6 0

3 years ago

Read 2 more answers

Consider a file system that uses inodes to represent files. Disk blocks are 8KB in size, and a pointer to a disk block requires

insens350 [35]

Answer:

64 terabytes

Explanation:

Given data:

Size of the disk block = 8 KB

Size required by the pointer to a disk block = 4 bytes

Now,

Size required by 12 direct disk blocks = 12 × 8

Size required by single disk block = 2048 × 8 KB

Size required by double disk block = 2048 × 2048 × 8 KB

size required by triple disk block = 2048 × 2048 × 2048 × 8 KB

Now,

the maximum size of the file that can be stored in the this file system = 12 × 8 + 2048 × 8 KB + 2048 × 2048 × 8 KB + 2048 × 2048 × 2048 × 8 KB = 64 terabytes

5 0

4 years ago