/*<applet code= "smileface.class" height="300" width="300"></applet>*/import java.awt.*;
import java.applet.*;
public class smileface extends Applet implements Runnable
{
int aflag;
Thread t;
public void init() {
t=new Thread(this); aflag=0;
t.start();
}
public void run()
{
try {
if (aflag==0)
{
t.sleep(1000);
aflag=1;
} else {
t.sleep(1000);
aflag=0;
}
repaint();
run();
}
catch(Exception e)
{
}
}
public void paint(Graphics g) {
34 g.drawOval(100,100,100,100);
g.fillOval(120,125,20,20);
g.fillOval(160,125,20,20);
g.drawLine(150,135,150,165);
if (aflag==0)
{ g.drawArc(140,160,20,20,0,-180);
aflag=1;
}
else {
g.drawArc(140,160,20,20,0,180);
aflag=0;
}
}
}
Write a java program which will display name and priority of current thread. Change name of Thread to MyThread and priority to 2. Display the details of Thread.
public class MainThread
{
public static void main(String arg[])
{
Thread t=Thread.currentThread();
System.out.println("Current Thread:"+t);
//Change Name t.setName("My Thread ");
System.out.println ("After the name is Changed:"+t);
try {
for(int i=2;i>0;i--)
{
System.out.println(i);
Thread.sleep(1000);
}
}
catch(Exception e)
{
System.out.println(e);
}
}
}
**OUTPUT***
D:\TY\Adv Java>javac MainThread.java
D:\TY\Adv Java>java MainThread
Current Thread:Thread[main,5,main]
After the name is Changed:Thread[My Thread ,5,main]
2 1
Write a Multithreading program in java to display the number’s between 1 to 100 continuously in a TextField by clicking on button. (use Runnable Interface)
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class MultiThread extends JFrame implements ActionListener
{
Container cc;
JButton b1,b2;
JTextField t1;
MultiThread()
{
setVisible(true);
setSize(1024,768);
cc=getContentPane();
setLayout(null);
t1=new JTextField(500);
cc.add(t1);
t1.setBounds(10,10,1000,30);
b1=new JButton("start");
cc.add(b1);
b1.setBounds(20,50,100,40);
b1.addActionListener(this);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)
{
new Mythread();
}
}
class Mythread extends Thread
{
Mythread()
{
start();
}
public void run()
{
for(int i=1;i<=100;i++)
{
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
}
t1.setText(t1.getText()+""+i+"\n");
//System.out.println() }
}
}
public static void main(String arg[])
{
new MultiThread().show();
}
}
Write a java program using multithreading to execute the threads sequentially .(Use Synchronized Method)
class SynchronizationDemo
{
synchronized void printTable(int n,String s2) //synchronized method synchronized {
System.out.println(s2);
for(int i=1;i<=5;i++)
{
System.out.println(n*i);
try {
Thread.sleep(400);
}
catch(Exception e)
{
System.out.println(e);
}
}
}
}
class MyThread1 extends Thread
{
Table t;
String s1="Table of five";
MyThread1(Table t)
{
this.t=t;
}
public void run()
{
t.printTable(7,s1);
}
}
class MyThread2 extends Thread
{
Table t;
String s1="Table of Ten";
MyThread2(Table t)
{
this.t=t;
}
29 public void run()
{
t.printTable(9,s1);
}
}
public class SynchronizationDemo
{
public static void main(String args[])
{
Table obj = new Table();//only one object MyThread1 t1=new MyThread1(obj);
MyThread2 t2=new MyThread2(obj);
t1.start();
t2.start();
}
}
**OUTPUT***
D:\TY\Adv Java>javac SynchronizationDemo.java
D:\TY\Adv Java>java SynchronizationDemo
Table of five
7 14 21 28 35 Table of Ten
9 18 27 36 45
Write a Multithreading program in java using Runnable interface to move text on the frame as follow
import java.awt.*;
import java.awt.event.*;
class MoveText extends Frame implements Runnable
{
Label l1;
Thread t;
int x,y,side;
public MoveText()
{
setLayout(null);
l1=new Label("Sachin ");
l1.setFont(new Font("",Font.BOLD,14));
l1.setForeground(Color.red);
setSize(400,400);
setVisible(true);
t=new Thread(this);
t.start();
x=5;
y=200;side=1;
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent we)
{
System.exit(0);
}
});
}
public void run()
{
try {
if(side==1)
{
t.sleep(50);
l1.setBounds(x+=5,y-=5,70,15);
add(l1);
26 if(y==20)
side=2;
}
if(side==2)
{
t.sleep(50);
l1.setBounds(x+=5,y+=5,70,15);
add(l1);
if(y==200)
side=3;
}
if(side==3)
{
t.sleep(50);
l1.setBounds(x-=5,y+=5,70,15);
add(l1);
if(y==390)
side=4;
}
if(side==4)
{
t.sleep(50);
l1.setBounds(x-=5,y-=5,70,15);
add(l1);
if(x==0)
{
side=1;
x=0;y=200;
}
}
}catch(Exception e)
{
System.out.println(e);
}
run();
}
public static void main(String args[])
{
new MoveText();
}
27}
Write a java program to simulate traffic signal using multithreading
/*<applet code= "signal.class" height="600" width="600"></applet>*/import java.awt.*;
import java.applet.*;
public class signal extends Applet implements Runnable
{
int r,g1,y,i;
Thread t;
public void init()
{
r=0;g1=0;y=0;
t=new Thread(this);
t.start();
}
public void run()
{
try { for (i=24;i>=1;i--)
{
t.sleep(100);
if (i>=16 && i<24)
{
g1=1;
repaint();
}
if (i>=8 && i<16)
{
y=1;
repaint();
}
if (i>=1 && i<8)
{
r=1;
repaint();
}
}
23 if (i==0)
{
run();
}
}
catch(Exception e)
{
}
}
public void paint(Graphics g) {
g.drawOval(100,100,100,100);
g.drawOval(100,225,100,100);
g.drawOval(100,350,100,100);
g.drawString("start",200,200);
if (r==1)
{ g.setColor(Color.red);
g.fillOval(100,100,100,100);
g.drawOval(100,100,100,100);
g.drawString("stop",200,200);
r=0;
}
if (g1==1)
{ g.setColor(Color.green);
g.fillOval(100,225,100,100);
g1=0;
g.drawOval(100,225,100,100);
g.drawString("go",200,200);
}
if (y==1)
{ g.setColor(Color.yellow);
g.fillOval(100,350,100,100);
y=0;
g.drawOval(100,350,100,100);
g.drawString("slow",200,200);
}
}
}
Write a menu driven java program for the following
import java.io.*;
import java.sql.*;
class Menu
{
public static void main(String args[])
{
DataInputStream din=new DataInputStream(System.in);
int rno,k,ch,per;
String nm;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection cn=DriverManager.getConnection("jdbc:odbc:BCA");
Statement st=cn.createStatement();
do {
System.out.println(" 1. Insert \n 2. Update \n 3. Delete \n 4. Search \n 5. Display \n 6. Exit");
System.out.print("Enter your choice: ");
ch=Integer.parseInt(din.readLine());
System.out.println("............................................");
switch(ch)
{
case 1:
System.out.print("How many records you want to inserted ? ");
Int n=Integer.parseInt(din.readLine());
for(int i=0;i<n;i++)
{
System.out.println("Enter Roll No : ");
rno=Integer.parseInt(din.readLine());
System.out.println("Enter Name : ");
nm=din.readLine();
System.out.println("Enter Percentage: ");
per=Integer.parseInt(din.readLine());
18 k=st.executeUpdate("insert into Stud values(" + rno + ",'"+ nm + "'," + per +")");
if(k>0)
{
System.out.println("Record Inserted Successfully..!!");
System.out.println("..............................................");
}
}
break;
case 2:
System.out.print("Enter the Roll no: ");
rno=Integer.parseInt(din.readLine());
System.out.print("Enter the Sname: ");
nm=din.readLine();
k=st.executeUpdate("update Stud set sname='" + nm + "' where rno="+rno);
if(k>0)
{
System.out.println("Record Is Updated..!!");
}
System.out.println("...............................................");
break;
case 3:
System.out.print("Enter the Roll no: ");
rno=Integer.parseInt(din.readLine());
k=st.executeUpdate("delete from Stud where rno=" +rno);
if(k>0)
{
System.out.println("Record Is Deleted..!!");
}
System.out.println(".............................................");
break;
case 4:
System.out.print("Enter the Roll no Whoes search record: ");
rno=Integer.parseInt(din.readLine());
System.out.println(".............................................");
ResultSet rs1=st.executeQuery("select * from Stud where rno=" +rno);
while(rs1.next())
{
System.out.println(rs1.getInt(1) +"\t" +rs1.getString(2)+"\t"+rs1.getInt(3));
}
19 System.out.println(".........................................");
break;
case 5:
ResultSet rs=st.executeQuery("select * from Stud");
while(rs.next())
{
System.out.println(rs.getInt(1) +"\t" +rs.getString(2)+"\t"+rs.getInt(3));
}
System.out.println(".............................................");
break;
case 6:
System.exit(0);
}
}
while(ch!=6);
}
catch(Exception e)
{
System.out.println("Error");
}
}
}
**OUTPUT**
D:\TY\Adv Java>javac Menu.java
D:\TY\Adv Java>java Menu
1. Insert
2. Update
3. Delete
4. Search
5. Display
6. Exit
Enter your choice: 1 ............................................
How many records you want to inserted ? 2 ............................................
Enter Roll No :
319 Enter Name :
Yogesh Jagtap
20 Enter Percentage:
75 Record Inserted Successfully..!!
..............................................
Enter Roll No :
342 Enter Name :
Sachin Shinde
Enter Percentage:
70 Record Inserted Successfully..!!
..............................................
1. Insert
2. Update
3. Delete
4. Search
5. Display
6. Exit
Enter your choice: 2 ............................................
Enter the Roll no: 342 Enter the Sname: Sachin Shinde
Record Is Updated..!!
1. Insert
2. Update
3. Delete
4. Search
5. Display
6. Exit
Enter your choice: 4 ............................................
Enter the Roll no Whoes search record: 319 .............................................
319 Yogesh Jagtap 75 .........................................
1. Insert
2. Update
3. Delete
4. Search
5. Display
21 6. Exit
Enter your choice: 3 ............................................
Enter the Roll no: 319 Record Is Deleted..!!
.............................................
1. Insert
2. Update
3. Delete
4. Search
5. Display
6. Exit
Enter your choice: 5 ............................................
342 Sachin Shinde 70 .............................................
1. Insert
2. Update
3. Delete
4. Search
5. Display
6. Exit
