CIS 67: Some Simple Java Programs

• The Hello program:
  • using System.out,
  • using System.in and System.out,
  • using javax.swing.JOptionPane output,
  • using javax.swing.JOptionPane input output,
• A simple Point class
• The euclidean algorithm to compute the gcd of two integers
• Printing a diamond graph
• Printing n Fibonacci numbers
• Overflow and roundoff errors.
• Printing the integer values of the printable ASCII characters
• An example that shows a usage of a command line parameter and of the substring method for Strings. It prints proper heads and tails of a string.
• Using Scanner on a String
• Redirecting a file to standard input
• Decimal and binary representation of an integer
• Generating a random permutation.
• The Birthday Paradox
• Collecting quarters from all states
• Linear search
• Selection sort
• Binary search
• Insertion sort
• Merging two sorted arrays
• Copying a file
• Merging two sorted files
• A random number generator
• Rotating the elements of an array

A large supply of examples of Java code, some for advanced applications, is at http://developer.java.sun.com/developer/codesamples/
Many more examples are in The Java Developers Almanac 1.4