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Vectors are created like the arrays but vector can hold the objects. And these objects can be of any type and size. In array the elements are must be homogeneous, …

In StringBuffer class we can create the flexible strings. Means we can easily increase the length of a string if we required, which we cannot do in the String class. …

To declare a string the syntax is as follows: Syntax:            String  string-name; String-name = new String(“string-line”); This can be written in one line as: String  string-name = new String(“string-line”); Methods: …

A string is a collection of characters and consider as a single data item. We can represent the string by following character array: char name[ ] = new char[9]; name[0]=’J’; …

In the single dimensional array we can store only values in the form of list, but sometimes we needs to process the data in the form of rows and columns …

The one dimensional array is the simplest form of the array. And is used for the multiple values in a single variable. Declaration syntax:   data-type  array-name[ ]; e.g:      int student[ …

The problem with the simple data type is it can only save one value at a time, suppose we want to save the roll number of the all students of …

The for loop is also entry-controlled loop. Syntax: for(initialization; condition; increment/decrement) { Body of loop } Initialization: in this part of the loop the variable is initialized such as i=0; …

In while loop the condition is evaluated first and then executes the body of loop and if the condition is not satisfied even at the very first attempt the body …

while loop is the simplest form of loop, and it is entry controlled loop statement. Syntax: while(test condition) { Body of loop } At the first, condition is evaluated and …