how to make a computer program run automatically on bluej

You must include the following statement to use the File class: import java.io.File You can use Java’s File class to gather file information, such as its size, its most recent modification date, and whether the file even exists.

Determining whether and where a file exists.

When you work with stored files in an application, you typically perform all or some of the following tasks: Computer files are the electronic equivalent of paper files often stored in file cabinets in offices. When you write a Java program and save it to a disk, you are using permanent storage.įiles exist on permanent storage devices, such as hard disks, Zip disks, USB drives, reels or cassettes of magnetic tape, and compact discs.

Permanent storage, on the other hand, is not lost when a computer loses power it is nonvolatile.

When you write a Java program that stores a value in a variable, you are using temporary storage the value you store is lost when the program ends or the computer loses power.

Temporary storage is usually called computer memory or random access memory (RAM).

When data items are stored in a computer system, they can be stored for varying periods of time-temporarily or permanently.

Java Defining, Instantiating and Starting Thread.

String buffer class and string builder class.

Important methods of String class with example.

Arrays - 2D array and Multi dimension array.

Java Object Oriented Programming concepts.

Compiling, running and debugging Java programs.Download and Install JDK, Eclipse (IDE).

How to make a computer program run automatically on bluej