Zero Exception

Write a Java program to accept the details of student (rollNo, name, percentage) from the user and insert it into the table (Use PreparedStatement class) Program: import java.sql.*; import java.io.*; class Student { public static void main(String args[]) throws SQLException, ClassNotFoundException, IOException { String name; int rollNo; float percentage; char ch; BufferedReader br; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); COnnection con = DriverManager.getConnection("jdbc:odbc:studentDSN"); do { PreparedStatement stmt = con.prepareStatement("insert into student values(?,?,?)"); br = new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter Roll No:"); rollNo = Integer.parseInt(br.readLine()); System.out.println("Enter Name:"); name = br.readLine();

Write a simulation program for disk scheduling using SCAN algorithm. Accept total number of disk blocks, disk request string, direction of head movement and current head position from the user. Display the list of request in order which it is served. Also display the total number of head movements. Program: #include<stdio.h> #include<conio.h> #include <string.h> int main2(void){ setbuf(stdout,NULL); int n,i,pr[50],cp,th,max,small,temp; char d; printf("\n Enter number of disk blocks:"); scanf("%d",&n); printf("\n Enter the current position of head:"); scanf("%d",&cp); printf("Enter the String:"); for(i=0;i<n;i++){ scanf("%d",&pr[i]); } printf("\nEnter the direction of head movement:"); scanf(" %c",&d); max=pr[0]; small=pr[0]; for(i=1;i<n;i++){ if(pr[i]>max){ max = pr[i]; } if(pr[i]<small){ small = pr[i]; } } if(d=='l

Write a Java program to accept the details of employee(eno, ename, salary) using AWT and insert into database. Program: import java.awt.*; import java.awt.event.*; import java.io.*; import java.sql.*; public class Employee extends Frame implements ActionListener { Label labelEno, labelEname, labelSalary; TextField textEno, textEname, textSalary; Button btnAdd; String sqlQuery; Statement s; Connection dbConnection; public Employee() throws ClassNotFoundException, SQLException { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); dbConnection = DriverManager.getConnection("jdbc.odbc:EmployeeDSN"); setLayout(new FlowLayout()); setSize(300,300); labelEno = new Label("Employee No:"); labelEname = new Label("Employee Name:"); labelSalary = new Label(Employee Salary:); textEno = new TextField(20); textEname = new TextField(20); textSalary = new TextField(20); btnAdd = new Button("Add"); btnAdd.addAction

Write a Program to implement "ls" command of UNIX with following options on DOS. "ls" to display files. "ls -a" to display all the hidden files. "ls -m" to display the files separated with commas. Program: #include<stdio.h> #include<stdlib.h> #include<string.h> #include<dirent.h> void ls(){ DIR *d; struct dirent *dn; char dr[20]; printf("Enter the Directory name:"); gets(dr); if((d=opendir(dr))==NULL){ printf("\nDirectory can't open"); } else { while((dn=readdir(d))!=NULL){ printf(" %s",dn->d_name); } } } void lsm(){ DIR *d; struct dirent *dn; char dr[20]; printf("Enter the Directory name:"); gets(dr); if((d=opendir(dr))==NULL){ printf("\nDirectory can't open"); } else{ while((dn=readdir(d))!=NULL){ printf("%s,",dn->d