Answered: java DDI Osrc main java >…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Question

import javax.swing.*;
import java.awt.*;
import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;

class MiniMac {
private Integer[] memory;
private boolean running;

public MiniMac() {
memory = new Integer[32];
Arrays.fill(memory, 0);
running = true;
}

public void load(int location, int value) {
memory[location] = value;
}

public void halt() {
running = false;
}

public void add(int src1, int src2, int dest) {
memory[dest] = memory[src1] + memory[src2];
}

public void mul(int src1, int src2, int dest) {
memory[dest] = memory[src1] * memory[src2];
}

public Integer[] getMemory() {
return memory;
}

public boolean isRunning() {
return running;
}
}

class Instruction {
private String opcode;
private int[] args;

public Instruction(String opcode, int[] args) {
this.opcode = opcode;
this.args = args;
}

public String getOpcode() {
return opcode;
}

public int[] getArgs() {
return args;
}

@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(opcode);
for (int arg : args) {
sb.append(" ").append(arg);
}
return sb.toString();
}
}

class MiniMacParser {
public static List<Instruction> parse(String program) {
List<Instruction> instructions = new ArrayList<>();
String[] lines = program.split("\n");
for (String line : lines) {
instructions.add(parseInstruction(line.trim()));
}
return instructions;
}

private static Instruction parseInstruction(String line) {
String[] tokens = line.split("\\s+");
String opcode = tokens[0];
int[] args = new int[tokens.length - 1];
for (int i = 1; i < tokens.length; i++) {
args[i - 1] = Integer.parseInt(tokens[i]);
}
return new Instruction(opcode, args);
}
}

public class ControlPanel extends JFrame {
private MiniMac miniMac;
private JList<String> memoryView;
private JList<String> programView;

public ControlPanel() {
miniMac = new MiniMac();
setupUI();
}

private void setupUI() {
memoryView = new JList<>();
programView = new JList<>();
JButton loadProgramButton = new JButton("Load Program");
loadProgramButton.addActionListener(e -> loadProgram());
JPanel panel = new JPanel(new GridLayout(1, 2));
panel.add(new JScrollPane(memoryView));
panel.add(new JScrollPane(programView));
add(panel, BorderLayout.CENTER);
add(loadProgramButton, BorderLayout.SOUTH);
setTitle("MiniMac Control Panel");
setSize(600, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}

private void loadProgram() {
String program = "load 0 10\nload 1 20\nadd 0 1 2\nmul 0 1 3";
List<Instruction> instructions = MiniMacParser.parse(program);
DefaultListModel<String> programModel = new DefaultListModel<>();
for (Instruction instruction : instructions) {
programModel.addElement(instruction.toString());
}
programView.setModel(programModel);
executeProgram(instructions);
}

private void executeProgram(List<Instruction> instructions) {
for (Instruction instruction : instructions) {
if (!miniMac.isRunning()) break;
executeInstruction(instruction);
}
}

I paste the half code and the rest half i sent you in screenshot. Please check why the output i am getting "Hello World" PLease check where i am doing mistake and help me to fix

Search
- Files Ⓒ
src
main
java
Control Panel.java
Packager files
target
pom.xml
→ Tools
Recent
All
CAI
Deployments
Authentication
Chat
Main.java
Control Panel.java X +
□src › □ main › java › Control Panel.java
129 v
130
131
132
133
134
135
136
V
137
138 v
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158 v
159
160
161
162
163
164
165
166
167 v
168
169
170 }
171
}
}
private void executeInstruction ( Instruction instruction) {
String opcode instruction.getOpcode();
instruction.getArgs();
int[] args
switch (opcode) {
case "load":
for (Instruction instruction: instructions) {
if (!miniMac.isRunning()) break;
executeInstruction (instruction);
}
}
}
}$$
=
}
miniMac.load(args[0], args[1]);
=
break;
case "halt":
miniMac.halt();$
break;
case "add":
miniMac.add(args[0], args[1], args[2]);
break;
case "mul":
miniMac.mul(args[0], args[1], args[2]);
break;
default:
private void updateMemoryView() {
DefaultListModel<String> memoryModel = new DefaultListModel<>();
Integer [] memory miniMac.getMemory();
for (int i = 0; i < memory.length; i++) {
memoryModel.addElement("Memory[" + i + "]:
// Placeholder for other operations
break;
updateMemoryView();
memoryView.setModel (memoryModel );
public static void main(String[] args) {
SwingUtilities.invokeLater(Control Panel::new);
+ memory[i]);
Format
Console
Run
Hello world!
Shell
+

Expert Solution

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions