#sachtech

[sachtechsolution-blog]

Radio buttons allow the user to select one option from a set. You should use radio buttons for optional sets that are mutually exclusive if you think that the user needs to see all available options side-by-side. If it's not necessary to show all options side-by-side, use a spinner instead.

[sachtech123-blog]

The final keyword in java is used to restrict the user. The java final keyword can be used in many context. Final can be:

variable

method

class

[sachtechsolution-blog]

A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars. The user can touch/drag or use arrow keys to set the rating when using the default size RatingBar. The smaller RatingBar style ( ratingBarStyleSmall) and the larger indicator-only style (ratingBarStyleIndicator) do not support user interaction and should only be used as indicators. When using a RatingBar that supports user interaction, placing widgets to the left or right of the RatingBar is discouraged. The number of stars set (via setNumStars(int) or in an XML layout) will be shown when the layout width is set to wrap content (if another layout width is set, the results may be unpredictable).

[sachtechsolution-blog]

Every Button is styled using the system's default button background, which is often different from one device to another and from one version of the platform to another. If you're not satisfied with the default button style and want to customize it to match the design of your application, then you can replace the button's background image with a state list drawable. A state list drawable is a drawable resource defined in XML that changes its image based on the current state of the button. Once you've defined a state list drawable in XML, you can apply it to your Button with the android:background attribute.

[sachtechsolution-blog]

Every Button is styled using the system's default button background, which is often different from one device to another and from one version of the platform to another. If you're not satisfied with the default button style and want to customize it to match the design of your application, then you can replace the button's background image with a state list drawable. A state list drawable is a drawable resource defined in XML that changes its image based on the current state of the button. Once you've defined a state list drawable in XML, you can apply it to your Button with the android:background attribute.

[sachtech123-blog]

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[sachtech123-blog]

// Inheritance class Parent { private void jewellery() { System.out.println("Private Jwellery"); } void bmw() { System.out.println("Parent BMW"); } void flat() { System.out.println("Parent Flat"); } } class Child extends Parent { void swift() { System.out.println("Child Swift"); } public static void main(String args[]) { Parent p1=new Parent(); p1.flat(); p1.bmw(); // p1.swift(); Child c1=new Child(); c1.swift(); c1.flat(); c1.bmw(); c1.jewellery(); } }

[sachtech123-blog]

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[sachtech123-blog]

Strings, which are widely used in Java programming, are a sequence of characters. In Java programming language, strings are treated as objects. The Javaplatform provides the String class to create and manipulate strings.

[sachtech123-blog]

Let's see the simple example of the Java Scanner class which reads the int, string and double value as an input:

import java.util.Scanner;

class ScannerTest{

public static void main(String args[]){

Scanner sc=new Scanner(System.in);

System.out.println("Enter your rollno");

int rollno=sc.nextInt();

[sachtech123-blog]

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[sachtech123-blog]

Constructor in java is a special type of method that is used to initialize the object.

Java constructor is invoked at the time of object creation. It constructs the values i.e. provides data for the object that is why it is known as constructor.

[sachtech123-blog]

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[sachtech123-blog]

If we decide to choose a three-dimensional array, here's how the array might be declared:

int[][][] colorImage = new int[numRows][numColumns][3];

However, wouldn't it be more effective like this?

int[][][] colorImage = new int[3][numRows][numColumns];

Where 3 is the rgb values, 0 being red, 1 being green, and 2 being blue

[sachtech123-blog]

Array is a collection of similar type of elements that have contiguous memory location. Java array is an object the contains elements of similar data type. It is a data structure where we store similar elements. We can store only fixed set of elements in a java array. Array in java is index based, first element of the array is stored at 0 index.