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PRACTICAL: 1
To develop application using swing component.
Write java programs for following:
1. Create 4 Jbuttons with label 1,2,3,4 and display them on
Jframe window.When you push a button,the number on
it is display on Jlabel.
2. An objective type question has three choice.one of the
choice is correct answer.There are five questions Each
correct ans got 2 marks.when the user pushes finish
jbuttonHis score should be displayed.
Part 1:
package practical_1;
import java.awt.Font; import java.awt.event.MouseEvent; import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class Gui_1 {
public static JButton getButton(String text,JPanel jp){ JButton jb=new JButton(text); jb.setSize(60,40); jp.add(jb); jb.addMouseListener(new MouseListener() { @Override public void mouseClicked(MouseEvent e) { JLabel jl=(JLabel)jp.getComponent(0); jl.setText("Entered Number : " + text); } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseReleased(MouseEvent e) {
Output:
Part 2:
package practical_1;
import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.MouseEvent; import java.awt.event.MouseListener;
import javax.swing.BoxLayout; import javax.swing.ButtonGroup; import
javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; public class Gui_2 { public static void addQuestion(JPanel jp, ButtonGroup bg, String[] option) {
jp.setLayout(new GridLayout(4, 1)); JLabel jl = new JLabel(option[0]); jp.add(jl);
JRadioButton init = new JRadioButton(); init.setSelected(true); init.setActionCommand("null"); init.setVisible(false); bg.add(init);
for (int i = 2; i < option.length; i++) { JRadioButton jr = new JRadioButton(option[i]);
jr.setSelected(false); jr.setActionCommand(String.valueOf(i - 1)); jr.setVisible(true); jp.add(jr); bg.add(jr); } }
public static JPanel getPanel() { JPanel jp = new JPanel(); jp.setMaximumSize(new Dimension(760, 200)); jp.setMinimumSize(new Dimension(760, 100)); jp.setVisible(true); return jp; }
private static void createUI() {
JFrame jf = new JFrame("Hardik"); jf.setSize(800, 800); jf.setVisible(true); jf.setLayout(new BoxLayout(jf.getContentPane(), BoxLayout.Y_AXIS));
JPanel jp = getPanel(); JPanel jp1 = getPanel(); JPanel jp2 = getPanel(); JPanel jp3 = getPanel(); JPanel jp4 = getPanel();
jf.add(jp); jf.add(jp1); jf.add(jp2); jf.add(jp3); jf.add(jp4);
ButtonGroup bg = new ButtonGroup(); ButtonGroup bg1 = new ButtonGroup(); ButtonGroup bg2 = new ButtonGroup(); ButtonGroup bg3 = new ButtonGroup(); ButtonGroup bg4 = new ButtonGroup();
String al[] = { "Are java and javascript same?", "2", "yes", "no", "don't know" }; String al1[] = { "MVC stands for?", "1", "Model View Controller", "Model vs
Computation", "don't know" }; String al2[] = { "who will kill thanos?", "3", "captain marvel", "thor", "all
together" };
String al3[] = { "Relation between ML,AI and DL", "3", "ML>AI>DL", "DL>AI>ML", "AI>ML>DL" };
String al4[] = { "what is spring?", "3", "season", "framework", "both" };
public static void main(String args[]) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() { createUI();
Output:
PRACTICAL: 2
To develope UDP client server application.
Write a Java program to using UDP to transfer text file from host
to another.
/CLIENT CLASS/
import java.net.; import java.io.; public class client { public static void main(String args[])throws Exception { byte b[]=new byte[1024]; FileInputStream f=new FileInputStream("D:/raj.txt"); DatagramSocket dsoc=new DatagramSocket(2000); int i=0; while(f.available()!=0) { b[i]=(byte)f.read(); i++; } f.close(); dsoc.send(new DatagramPacket(b,i,InetAddress.getLocalHost(),1000)); }
} /SERVER CLASS/ import java.net.; import java.io.; public class server { public static void main(String args[])throws IOException { byte b[]=new byte[3072]; DatagramSocket dsoc=new DatagramSocket(1000); FileOutputStream f=new FileOutputStream("D:/nandha.txt"); while(true) { DatagramPacket dp=new DatagramPacket(b,b.length); dsoc.receive(dp); System.out.println(new String(dp.getData(),0,dp.getLength()));
} } }
OUTPUT:
/Client class/
raj.txt kanagaraj
D:\java\EXNO-7>java client
/server class/
D:\java\EXNO-7>java server
Kanagaraj
PRACTICAL: 3
To develope TCP client server application.
Write a Java program where client sends a string as a message
and server counts the number of characters in string.server
sends back this value to client.server should be able to serve
multiple clients simultaneously.
ServerSideSocket.java
import java.net.; import java.io.;
class ServerSideSocket implements Runnable
{ private Socket s=null; public ServerSideSocket(Socket s) { this.s=s; }
public static void main(String args[]) throws Exception{
ServerSocket ss=new ServerSocket(6666); while(true) { Socket s=ss.accept(); System.out.println("Request is coming from "+s.getPort()); new Thread(new ServerSideSocket(s)).start(); } } @Override public void run(){
DataOutputStream dout=null; DataInputStream din=null; try{
dout=new DataOutputStream(s.getOutputStream()); din=new DataInputStream(s.getInputStream()); BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String str1=br.readLine(); dout.writeUTF(str1);
dout.flush();
10
int ans=din.readInt(); System.out.println("server says: "+ans);
dout.close(); din.close(); br.close(); s.close();
Output:
ADVANCED JAVA - 2160707 170280107101
try{ Connection con=DbConnection.getConnection(); Statement st=con.createStatement(); st.executeUpdate("CREATE TABLE book(id int,title varchar(25), author
varchar(40),price float)");
} catch(SQLException e){ e.printStackTrace(); } } }
Part2: package practical_2;
import java.sql.Connection; import java.sql.SQLException; import java.sql.Statement; import java.util.Scanner;
public class App_2 {
private static int id=100;
public static void main(String args[])
{ try{ Connection con=DbConnection.getConnection(); Statement st=con.createStatement(); Scanner in=new Scanner(System.in); int i=1; while(i<=20){ System.out.println("record no : " +i); System.out.println("enter title without space:"); String title=in.next(); System.out.println("enter author name without space:"); String author=in.next(); System.out.println("enter price :");
float price=in.nextFloat();
st.executeUpdate("insert into book values(" + id + ", '"+title+"','"+author+"',"+price+")"); id++; i++;
catch(SQLException e) {
Part3: package practical_2;
import java.sql.Connection; import
java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.Scanner; public class App_3 {
public static void main(String[] args){ Connection con; Scanner in=new Scanner(System.in); try { con = DbConnection.getConnection(); PreparedStatement ps=con.prepareStatement("select * from book
where title=? or author=?");
System.out.println("enter keyword: "); String keyword=in.next(); ps.setString(1, keyword); ps.setString(2, keyword); ResultSet rs=ps.executeQuery(); while(rs.next()){ System.out.println("id :"+rs.getInt(1)); System.out.println("title :"+rs.getString(2)); System.out.println("author : "+rs.getString(3)); System.out.println("price :"+rs.getFloat(4)); } } catch (SQLException e) { e.printStackTrace(); }
Output:
Part4: package practical_2;
} catch (SQLException e) { e.printStackTrace(); }
Output:
Part5: package practical_2;
import java.sql.Connection; import
java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Statement; public class App_5 {
public static void main(String[] args) { Connection con;
try { con = DbConnection.getConnection(); Statement st = con.createStatement(); ResultSet rs = st.executeQuery("select * from book"); ResultSetMetaData rsmd = rs.getMetaData(); int c = rsmd.getColumnCount(); while (c > 0) { System.out.print("name : "+rsmd.getColumnName(c)+" "); System.out.print("type : "+rsmd.getColumnTypeName(c)+" "); System.out.println("size : "+rsmd.getColumnDisplaySize(c)); c--; } } catch (SQLException e) { e.printStackTrace(); } }
}
Output:
