Sleep

Professor Kit Romano's Web Site

Site Index

About Me
Welcome
Definition of Program
Variable Types
Understanding Memory
Declaring Variables
Simple Commands
Concatenation and Strings
Sleep-Threads-Try Catch
Campus Scenes
Pictures
Java simplified
Application Shell Styles
Reading Data From File
Overview of Applets
Excellent Graphics Applet
Online Reference
Nested if statements
Arrays
Sorting Arrays
Using Strings
Functions
Top 20 Replies
First program 211
Important Class Example
JAVA in SDK Environment
Understanding OOP
OOP simple example
Recursion example
Example of Inheritance
and use of JTextArea

Programming Examples

Sleep Threads and Try Catch

// catching exceptions is an important part of good
// software design. Handle a problem if it occurs
// so that your program can keep running
// Threads are important in I/O -- we will doscuss later
// but below is how to create a pause for so many milliseconds
// In English try to pause for 100 milliseconds and if you can
// not then catch the exception and do something else (etc )

Thread t1 = new Thread();
......
......

try { t1.sleep(100); }
catch(Exception e )
{ etc }
--------------------------------------------------------------
// an easier example to see

try
{
avg = tot / num // assume num is zero
}
catch (ArithmeticException e)
{
do something here to deal with the error
}
--------------------------------------------------------------
// multiple branching branch if 1 or 2 or neither
// this can replace a series of if statements

switch(number)
{
case 1: ........
break;
case 2: ......
break;
default: ......
break;
}
-------------------------------------------------------------
// different variation on a for loop

for (i=1, j=1, k=1; K < 100; k++,i++,j++)
{
...
}
------------------------------------------------------------