Java · Theory

History of Java

Theory

2/270

History of Java

Java started at Sun Microsystems. James Gosling’s team first called it Oak. They wanted one language that could run on many kinds of machines, not just one brand of computer.

Oak was later named Java. It grew with the internet, then with big company software. Today Oracle looks after Java, and companies still hire for it.

Don’t mug only years. What matters is the idea: portable, safer code. That is why JVM and bytecode exist. If the interviewer asks “who created Java?”, say James Gosling / Sun. If they ask “why?”, say portability.

Let's take this on the board with one tiny Main class — no extra files. History of Java — output: Oak became Java then James Gosling / Sun Microsystems. Real names from Java history. Start from main, go line by line, and stop at each print. That output is the proof for History of.

Exam tip

Say: Oak → Java, James Gosling / Sun. Goal was portability. Now Oracle. Don’t only recite years.

Example

// History of Java
public class Main {
  public static void main(String[] args) {
    String oldName = "Oak";
    String today = "Java";
    System.out.println(oldName + " became " + today);
    System.out.println("James Gosling / Sun Microsystems");
  }
}

History of Java — output: Oak became Java then James Gosling / Sun Microsystems. Real names from Java history.

Short notes

DefJava started as Oak at Sun Microsystems (James Gosling).
RuleName changed to Java. Goal was one language for many machines.
RememberToday Oracle looks after Java. Years matter less than this idea.
UseThis history explains why JVM and bytecode exist.

Java · Theory

History of Java

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Theory

2/270

History of Java

Java started at Sun Microsystems. James Gosling’s team first called it Oak. They wanted one language that could run on many kinds of machines, not just one brand of computer.

Oak was later named Java. It grew with the internet, then with big company software. Today Oracle looks after Java, and companies still hire for it.

Exam tip

Say: Oak → Java, James Gosling / Sun. Goal was portability. Now Oracle. Don’t only recite years.

Example

// History of Java
public class Main {
  public static void main(String[] args) {
    String oldName = "Oak";
    String today = "Java";
    System.out.println(oldName + " became " + today);
    System.out.println("James Gosling / Sun Microsystems");
  }
}

History of Java — output: Oak became Java then James Gosling / Sun Microsystems. Real names from Java history.

Short notes

DefJava started as Oak at Sun Microsystems (James Gosling).
RuleName changed to Java. Goal was one language for many machines.
RememberToday Oracle looks after Java. Years matter less than this idea.
UseThis history explains why JVM and bytecode exist.

History of Java

Example

Short notes

Questions

History of Java

Example

Short notes

Questions