The document provides a Java implementation of the Banker's Algorithm for deadlock avoidance in operating systems. It includes a main class that gathers user input for the number of processes and resource types, initializes resource allocation and maximum demand matrices, and checks for a safe sequence. Based on the analysis, the program indicates whether the system is in a safe state or if a deadlock occurs.

1. Implementation of Banker’s Algorithm using java is given below:
package bankersalgorithm;
import javax.swing.JOptionPane;
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
int n = Integer.parseInt(JOptionPane.showInputDialog("Number Of Process:"));
int m = Integer.parseInt(JOptionPane.showInputDialog("Resource Type Number:"));
int available[] = new int[m];
int max[][] = new int[n][m];
int allocation[][] = new int[n][m];
int need[][] = new int[n][m];
String sequence = "";
for(int i = 0; i < m; i++)
{
available[i] = Integer.parseInt(JOptionPane.showInputDialog("Number Of Available Resource
" + (i) + ":"));
}
for(int i = 0; i < n; i++)
{
for(int j = 0; j < m; j++)
{
allocation[i][j] = Integer.parseInt(JOptionPane.showInputDialog("Allocation P " + (i) + " for
R " + (j) + ":"));
}

2. }
for(int i = 0; i < n; i++)
{
for(int j = 0; j < m; j++)
{
max[i][j] = Integer.parseInt(JOptionPane.showInputDialog("MAX P " + (i) + " for R " + (j) +
":"));
need[i][j] = max[i][j] - allocation[i][j];
}
}
int work[] = available;
boolean finish[] = new boolean[n];
for(int i = 0; i < n; i++)
{
finish[i] = false;
}
boolean check = true;
while(check)
{
check = false;
for(int i = 0; i < n; i++)
{
if(!finish[i])
{
int j;
for(j = 0; j < m; j++)
{
if(need[i][j] > work[j])
{
break;
}
}

3. if(j == m)
{
for(j=0; j < m; j++)
{
work[j] = work[j] + allocation[i][j];
}
finish[i] = true;
check = true;
sequence += i + ", ";
}
}
}
}
int i;
for(i = 0; i < n; i++)
{
if(!finish[i])
break;
}
if(i==n)
{
JOptionPane.showMessageDialog(null, "SAFE And Sequence is:"+sequence);
}
else
{
JOptionPane.showMessageDialog(null, "DEAD LOCK");
}
}
}
Solution
Implementation of Banker’s Algorithm using java is given below:

4. package bankersalgorithm;
import javax.swing.JOptionPane;
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
int n = Integer.parseInt(JOptionPane.showInputDialog("Number Of Process:"));
int m = Integer.parseInt(JOptionPane.showInputDialog("Resource Type Number:"));
int available[] = new int[m];
int max[][] = new int[n][m];
int allocation[][] = new int[n][m];
int need[][] = new int[n][m];
String sequence = "";
for(int i = 0; i < m; i++)
{
available[i] = Integer.parseInt(JOptionPane.showInputDialog("Number Of Available Resource
" + (i) + ":"));
}
for(int i = 0; i < n; i++)
{
for(int j = 0; j < m; j++)
{
allocation[i][j] = Integer.parseInt(JOptionPane.showInputDialog("Allocation P " + (i) + " for
R " + (j) + ":"));
}
}
for(int i = 0; i < n; i++)
{

5. for(int j = 0; j < m; j++)
{
max[i][j] = Integer.parseInt(JOptionPane.showInputDialog("MAX P " + (i) + " for R " + (j) +
":"));
need[i][j] = max[i][j] - allocation[i][j];
}
}
int work[] = available;
boolean finish[] = new boolean[n];
for(int i = 0; i < n; i++)
{
finish[i] = false;
}
boolean check = true;
while(check)
{
check = false;
for(int i = 0; i < n; i++)
{
if(!finish[i])
{
int j;
for(j = 0; j < m; j++)
{
if(need[i][j] > work[j])
{
break;
}
}
if(j == m)
{
for(j=0; j < m; j++)

6. {
work[j] = work[j] + allocation[i][j];
}
finish[i] = true;
check = true;
sequence += i + ", ";
}
}
}
}
int i;
for(i = 0; i < n; i++)
{
if(!finish[i])
break;
}
if(i==n)
{
JOptionPane.showMessageDialog(null, "SAFE And Sequence is:"+sequence);
}
else
{
JOptionPane.showMessageDialog(null, "DEAD LOCK");
}
}
}