Advertisements

Aatul Palandurkar

Posts Tagged ‘java code example

Objectives :

  • Write a program to compute sum of digits of a given number.
  • Write a program to find sum of digits of a given number.
  • Write a program to calculate sum of digits of a given number.
  • Write a program to compute sum of digits of a given integer number.
  • Write a program to compute sum of digits of a number entered via Command Line.
  • Write a program to compute sum of digits of a given number. Take input from Command Line.
  • Write a program to compute sum of digits of a given number. Take input using Scanner class.

Following is the Java Program to compute Sum of Digits of a given integer number;

Method 1 : Java Program to find Sum of Digits when number is entered from command line


class SumOfDigits
{
public static void main(String args[])
{
int n;
int a=0;
int sum=0;

//taking integer number from command line and parsing the same
n=Integer.parseInt(args[0]);

while(n!=0)
{
a=n%10;
n=n/10;
sum=sum+a;
}
System.out.println("Sum of digits: " + sum);
}
}

Steps to run above program via command line :

  1. Compilation : C:\JavaPrograms>javac SumOfDigits.java
  2. Interpretation : C:\JavaPrograms>java SumOfDigits 12345

Output : Sum of digits: 15

Method 2 : Java Program to find Sum of Digits if input is taken using Scanner class


import java.util.Scanner;

public class SumOfDigits {
public static void main(String args[]) {
Scanner in = new Scanner(System.in);
int n;
int a=0;
System.out.print("Enter a positive number: ");
n = in.nextInt();

if (n <= 0)
System.out.println("You have entered a negative number.");
else {
int sum = 0;

while (n != 0) {

a=n%10;
n=n/10;
sum=sum+a;
}
System.out.println("Sum of digits: " + sum);
}
}
}

Steps to run above program via command line :

  1. Compilation : C:\JavaPrograms>javac SumOfDigits.java
  2. Interpretation : C:\JavaPrograms>java SumOfDigits 12345

Output :

Trial 1 : With positive number

Enter a positive number: 12345

Sum of digits: 15

Trial 2 : With negative number

Enter a positive number: -12345

You have entered a negative number.

Advertisements

Objectives :

  • How to set TextView in Android?
  • How to add TextView in Android?
  • How to add TextView in Android via Java program?
  • How to set Layout parameters from Java code in Android?

TextView is a one of the Views available in Android. There are two (2) ways to add TextView in your Android application as follows :

  1. Using XML code
  2. Using Java code

XML Code example – Adding to a TextView in a layout xml file

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:orientation="vertical" >

 <TextView
  android:id="@+id/textView"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="Hello World" />

</LinearLayout>

 

Java Code example – Creating and adding a new TextView to a Layout

// Creates object of TextView
TextView textView = new TextView(this);
// Set text to display in TextView on Screen
textView.setText(“Hello World”);
// Add TextView to Linear Layout with layout parameters
((LinearLayout)findViewById(R.id.mainLayout))
 .addView(textView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

Above Java code can be written in onCreate() of your Activity.

Here LayoutParams.FILL_PARENT will set layout height to FILL_PARENT, LayoutParams.WRAP_CONTENT will set layout width to WRAP_CONTENT.

Posted from WordPress for Android


Advertisements

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 13,212 other followers

Tweets

YouTube

Archives

Advertisements
%d bloggers like this: