import java.util.Scanner;
public class CheckPowerTwo {
public static void main(String args[])
{
Scanner ob= new Scanner(System.in);
int a,i;
System.out.println("Enter an integer");
a=ob.nextInt();
for( i=0;i<a;i++)
{
if(a==Math.pow(2,i))
{ System.out.println("The number is power of two");break;
}
}
if(i==a)
System.out.println("The number is not power of two");
}
}
import java.io.FileInputStream;
public class ReadFile {
public static void main(String args[])
{ FileInputStream fin ;
try{
fin= new FileInputStream("C:\\Users\\user\\Desktop\\ash.txt");
int c;
while((c=fin.read())!=-1)
{
System.out.print((char)c);
}
}
catch(Exception e){}
}
}
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileOutputStream;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
public class StudentDatabase extends JFrame{
static FileOutputStream fou;
class Handler implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
String s0 = "\r\n";
byte h0[]=s0.getBytes();
String s=" ";
byte h[]=s.getBytes();
String s1= t1.getText();
byte h1[]=s1.getBytes();
String s2= t2.getText();
byte h2[]=s2.getBytes();
String s3= t3.getText();
byte h3[]=s3.getBytes();
String s4= t4.getText();
byte h4[]=s4.getBytes();
String s5= t5.getText();
byte h5[]=s5.getBytes();
try{
fou.write(h1);
fou.write(h);
fou.write(h2);
fou.write(h);
fou.write(h3);
fou.write(h);
fou.write(h4);
fou.write(h);
fou.write(h5);
fou.write(h0);
t1.setText("");
t2.setText("");
t3.setText("");
t4.setText("");
t5.setText("");
JOptionPane j= new JOptionPane();
j.showMessageDialog(rootPane, "RECORD ADDED");
}
catch(Exception ee)
{}
}
}
JTextField t1;
JTextField t2;
JTextField t3;
JTextField t4;
JTextField t5;
JButton b;
StudentDatabase()
{b= new JButton("ADD");
Handler k = new Handler();
b.setBounds(50, 250, 70, 30);
b.addActionListener(k);
JLabel j1= new JLabel("STUDENT DATABASE");
j1.setBounds(90, 30,140, 20);
t1= new JTextField();
t1.setBounds(200,50,150,20);
JLabel j2= new JLabel("STUDENT NAME");
j2.setBounds(50, 50,150, 20);
t2= new JTextField();
t2.setBounds(200,80,150,20);
JLabel j3= new JLabel("STUDENT ROLL. NO.");
j3.setBounds(50, 80,150, 20);
JLabel j4= new JLabel("STUDENT BRANCH");
j4.setBounds(50, 110,150, 20);
t3= new JTextField();
t3.setBounds(200,110,150,20);
JLabel j5= new JLabel("DOB");
j5.setBounds(50, 140,150, 20);
t4= new JTextField();
t4.setBounds(200,140,150,20);
JLabel j6= new JLabel("STUDENT SECTION");
j6.setBounds(50, 170,150, 20);
t5= new JTextField();
t5.setBounds(200,170,150,20);
add(j1);
add(t1);
add(j2);
add(t2);
add (b);
add(t3);
add(t4);
add(t5);
add(j3);
add(j4);
add(j5);
add(j6);
setSize(400, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(null);
setVisible(true);
}
public static void main(String args[])
{ new StudentDatabase();
try{ fou= new FileOutputStream("C:\\Users\\user\\Desktop\\aa.txt");}
catch(Exception ee)
{}
}
}
-------------------------------------------------------------
import java.io.FileInputStream;
public class ReadFile {
public static void main(String args[])
{ FileInputStream fin ;
try{
fin= new FileInputStream("C:\\Users\\user\\Desktop\\ash.txt");
int c;
while((c=fin.read())!=-1)
{
System.out.print((char)c);
}
}
catch(Exception e){}
}
}
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class WeightConv extends JFrame {
class Handler implements ActionListener{
public void actionPerformed(ActionEvent e) {
String s= a1.getText();
double d= Integer.parseInt(s);
if(kg1.isSelected()&&kg2.isSelected())
{ a2.setText(s);
}
if(kg1.isSelected()&£2.isSelected())
{ double pou= d*2.205;
a2.setText( Double.toString(pou));
}
if(kg1.isSelected()&&ounce2.isSelected())
{ double ounce=d*35.274;
a2.setText( Double.toString(ounce));}
if(pound1.isSelected()&&kg2.isSelected())
{ double kgs= d/2.205;
a2.setText( Double.toString(kgs));}
if(pound1.isSelected()&£2.isSelected())
a2.setText(s);
if(pound1.isSelected()&&ounce2.isSelected())
{double ounces=d/.0625;
a2.setText( Double.toString(ounces));
}
if(ounce1.isSelected()&&kg2.isSelected())
{ double kgs2=d/35.274;
a2.setText( Double.toString(kgs2));}
if(ounce1.isSelected()&£2.isSelected())
{double pounds2= d*.0625;
a2.setText( Double.toString(pounds2));}
if(ounce1.isSelected()&&ounce2.isSelected())
a2.setText(s);
}
}
JButton b;
JTextArea a2;
JTextField a1;
JCheckBox kg1;
JCheckBox kg2;
JCheckBox pound1;
JCheckBox pound2;
JCheckBox ounce1;
JCheckBox ounce2;
WeightConv()
{Handler h= new Handler();
JLabel l= new JLabel( "WEIGHT CONVERTER");
l.setBounds(120, 0, 180, 20);
add(l);
JLabel l2= new JLabel( "INPUT UNIT");
l2.setBounds(56, 65, 100, 10);
add(l2);
JLabel l3= new JLabel( "OUTPUT UNIT");
l3.setBounds(230, 65, 100, 10);
add(l3);
b= new JButton("Convert");
b.setBounds(120, 260, 100, 50);
a1= new JTextField();
a1.setBounds(120, 20, 100, 30);
a2=new JTextArea();
a2.setBounds(120, 310, 100, 40);
kg1= new JCheckBox("KG");
kg1.setBounds(50,110, 140, 20);
kg2= new JCheckBox("KG");
kg2.setBounds(230, 110, 140, 20);
pound1= new JCheckBox("Pounds");
pound1.setBounds(50, 160, 100,20);
pound2= new JCheckBox("Pounds");
pound2.setBounds(230, 160, 100,20);
ounce1= new JCheckBox("Ounce");
ounce1.setBounds(50, 210, 100,20);
ounce2= new JCheckBox("Ounce");
ounce2.setBounds(230, 210, 100,20);
add(b);
add(kg1);
add(kg2);
add(a1);
add(a2);
add(pound1);
add(pound2);
add(ounce1);
add(ounce2);
b.addActionListener(h);
setSize(400, 400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(null);
setVisible(true);
}
public static void main(String args[])
{ WeightConv obj= new WeightConv();}
}
import java.util.Scanner;
public class CheckEven {
public static void main(String args[])
{
Scanner ob= new Scanner(System.in);
int a;
System.out.println("Enter an integer");
a=ob.nextInt();
if(a%2==0)
System.out.println("The Entered number is even");
else
System.out.println("The Entered number is odd");
}
}
import java.util.Scanner;
public class CheckPalindrome {
public static void main(String args[])
{
Scanner ob= new Scanner(System.in);
double k;int a,count=0;
double r=0;
System.out.println("Enter an integer");
a=ob.nextInt();
int b=a;
while(b!=0) //loop to count number of digits in a
{b=b/10;
count++;
}
b=a;
for(int i=count;i>0;i--)
{k=b%10;
k*= Math.pow(10,i-1);
r+=k;
b=b/10;
}
if(a==r)
System.out.println("The number is a palindrome");
else
System.out.println("The number is not a palindrome");
}
}
import java.util.Scanner;
public class CheckPrime {
public static void main(String args[])
{
Scanner ob= new Scanner(System.in);
int a,i;
System.out.println("Enter an integer");
a=ob.nextInt();
if(a==1)
System.out.println("Number is prime");
for(i=2;i<a;i++)
{
if(a%i==0)
{System.out.println("Number is composite");
break;}
}
if(i==a)
System.out.println("Number is prime");
}}
