Multiple Runs of Thread Problem

Question

hello friends ,
i have the following code where there are two threads and they will execute simultaneously
but the error is
<code>
import java.util.*;
import java.lang.*;
class Demo1.java extends Thread
public void run()
for (int i=0;i<10li++)
System.out.println("Demo 1"+i)
try
Thread.sleep(1000);
catch(InterruptedException e)
System.out.println("some distrubance " +e);
class Demo2 extends Thread
public void run()
for(int i=0;i<10;i++)
System.out.println("Demo 2"+i);
try
Thread.sleep(1000);
catch(InterruptedException e)
System.out.println("some disturbance");
public class MultipleRuns
public void main(String args[])
Demo1 d1=new Demo1();
Demo2 d2=new Demo2();
d1.start();
d2.start();
</code>
the error its giveing is while compiling
[root@server java]# javac MultipleRuns.java
MultipleRuns.java:4: '{' expected
class Demo1.java extends Thread
^
MultipleRuns.java:58: '}' expected
^
MultipleRuns.java:55: cannot resolve symbol
symbol : method start ()
location: class Demo1
d1.start();
^
3 errors
so please guide me where iam going wrong
with regards
rama kanth

Answer 1

i have changed like the following even though i get the errors
<code>
import java.util.*;
import java.lang.*;
class Demo1.java extends Thread
public void run()
for (int i=0;i<10li++)
System.out.println("Demo 1"+i)
try
Thread.sleep(1000);
catch(InterruptedException e)
System.out.println("some distrubance " +e);
class Demo2 extends Thread
public void run()
for(int i=0;i<10;i++)
System.out.println("Demo 2"+i);
try
Thread.sleep(1000);
catch(InterruptedException e)
System.out.println("some disturbance");
public class MultipleRuns
public void main(String args[])
Demo1 d1=new Demo1();
Demo2 d2=new Demo2();
d1.start();
d2.start();
</code>
eroors are
[root@server java]# javac MultipleRuns.java
MultipleRuns.java:4: '{' expected
class Demo1.java extends Thread
^
MultipleRuns.java:58: '}' expected
^
MultipleRuns.java:55: cannot resolve symbol
symbol : method start ()
location: class Demo1
d1.start();
^
3 errors
so please guide me
with regards