BTW, how can I install a full JDK for viewing (in Javadoc?)? Is there a free version available?

1. Will I be able to use the package from within Eclipse? From the earlier reply it seems I can.
   
2. Will I be able to use Javadoc tab to use the information package?
   

This procedure installs the Java Development Kit (JDK) for 32-bit Linux, using an archive binary file (.tar.gz).

These instructions use the following file:

jdk-8uversion-linux-i586.tar.gz

Download the file.

Before the file can be downloaded, you must accept the license agreement. The archive binary can be installed by anyone (not only root users), in any location that you can write to. However, only the root user can install the JDK into the system location.

Change directory to the location where you would like the JDK to be installed, then move the .tar.gz archive binary to the current directory.

Unpack the tarball and install the JDK.

% tar zxvf jdk-8uversion-linux-i586.tar.gz

The Java Development Kit files are installed in a directory called jdk1.8.0_version in the current directory.

Delete the .tar.gz file if you want to save disk space.

import java.util.Arrays;
public class HW_import_java_util_Arrays {
	public static void main(String[] args) {
		System.out.println("Hello World!");
		System.out.println(Arrays.toString(args));
	    	}
	}

System.out.println(Arrays.toString(args));

java.lang.System
The System class contains several useful class fields and methods. It cannot be instantiated.

PrintStream java.lang.System.out
out
public static final PrintStream out
The "standard" output stream. This stream is already open and ready to accept output data. Typically this stream corresponds to display output or another output destination specified by the host environment or user.
For simple stand-alone Java applications, a typical way to write a line of output data is:
System.out.println(data)
See the println methods in class PrintStream.

void java.io.PrintStream.println(String x)
println
public void println(String x)
Prints a String and then terminate the line. This method behaves as though it invokes print(String) and then println().
Parameters:
x - The String to be printed.

java.util.Arrays
This class contains various methods for manipulating arrays (such as sorting and searching). This class also contains a static factory that allows arrays to be viewed as lists.
The methods in this class all throw a NullPointerException if the specified array reference is null, except where noted.
The documentation for the methods contained in this class includes briefs description of the implementations. Such descriptions should be regarded as implementation notes, rather than parts of the specification. Implementors should feel free to substitute other algorithms, so long as the specification itself is adhered to. (For example, the algorithm used by sort(Object[]) does not have to be a mergesort, but it does have to be stable.)
This class is a member of the Java Collections Framework.

String java.util.Arrays.toString(Object[] a)
toString
public static String toString(Object[] a)
Returns a string representation of the contents of the specified array. If the array contains other arrays as elements, they are converted to strings by the Object.toString() method inherited from Object, which describes their identities rather than their contents.
The value returned by this method is equal to the value that would be returned by Arrays.asList(a).toString(), unless a is null, in which case "null" is returned.
Parameters:
a - the array whose string representation to return
Returns:
a string representation of a

String[] HW_import_java_util_Arrays.main(String[]).args

How do I link these separate informations on the APIs available in the Javadoc or Java API index?
There are no explicit examples on how to link and use them in a meaningful way within a program.

Let me now approach the problem from the other side. Suppose that I have these four APIs within the http://docs.oracle.com/javase/8/docs/api/index.html

1. PrintStream java.lang.System.out
   
2. void java.io.PrintStream.println(String x)
   
3. java.util.Arrays
   
4. String java.util.Arrays.toString(Object[] a)

What I mean is that, if I come across these above four API definitions/descriptions independently, I wouldn't be in a position to know that they could be weaved together into a meaningful form:
System.out.println(Arrays.toString(args)); unless I have specific examples.

This is what I need to know:
How to be able to weave together terms from the list: http://docs.oracle.com/javase/8/docs/api/index.html into code lines that work in a meaningful way?
Made into a separate thread for your attention and suggestion: How to combine separate APIs in meaningful ways?