Java program to generate random numbers

Objectives:

Write a Java program to to generate random numbers and print the same
Write a program to generate random numbers
Write a program to generate random numbers in Java

Java Program:

[sourcecode lang="java"]

import java.util.Scanner;
import java.util.Random;

class GenerateRandomNumber
{
public static void main(String[] args)
{
int maxRange;

//create objects
Scanner SC = new Scanner(System.in);
Random rand = new Random();

System.out.print("Please enter maximum range: ");
maxRange=SC.nextInt();

for(int i=1; i<=10; i++)
{
System.out.println(rand.nextInt(maxRange));
}
}
}

[/sourcecode]

Output:

Please enter maximum range: 500
467
61
100
449
68
316
445
224
54
498

Find duplicate characters in string

Objectives:

Write a Java program to find duplicate characters in the string and print the duplicate characters
Write a program to find duplicate characters in String

Java Program:

[sourcecode lang="java"]
public class DuplicateCharacters {
    public static void main(String args[]) {

        String str = "NITIN";
        int count = 0;

        char input[] = str.toCharArray();
        System.out.println("Duplicate Characters are:");

        for (int i = 0; i &amp;lt; str.length(); i++) {
            for (int j = i + 1; j &amp;lt; str.length(); j++) {
                if (input[i] == input [j]) {
                    System.out.println(input[j]);
                    count++;
                    break;
                }
           }
        }
    }
}
[/sourcecode]

Output:

Duplicate Characters are: N I

Passing String in Switch Case in Java

Objectives:

How to use switch case in Java?
How to use switch case with string in Java?
How to pass string literals in switch case in Java?

Source Code:

[sourcecode lang=”java”]

public class SwitchWithStringExample

{
public static void main(String[] args)
{
String str = "two";
switch(str)
{
case "one":
System.out.println("one");
break;
case "two":
System.out.println("two");
break;
case "three":
System.out.println("three");
break;
default:
System.out.println("no match");
} // switch close
} // main close
} // class close

[/sourcecode]

Steps to run above Java code:

Consider that we have saved code at C drive (c:\>) and the file is saved as SwitchWithStringExample.java

Compilation : c:\> javac SwitchWithStringExample.java
Interpretation : c:\> java SwitchWithStringExample

Output:

two

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April 2, 2020 by Aatul Palandurkar Core Java Tutorials Java Source Code Java Tutorials NetBeans IDE Source Code 0

Using For Each in Java

Objective:

How to use For Each in Java?
How to use advance for in Java?
How to use advance for loop in Java Programming Language?
Types of For loop in Java

Source Code:

[sourcecode lang=”Java”]

class ForEachExample
{
public static void main(String args[])
{
//declaring an array
int a[]={1,2,3,4,5,6};

// Old way
System.out.println("Old way");
for(int i=0; i<a.length;i++)
{
System.out.println(a[i]);
}

//New way: for-each loop
System.out.println("For each");
for(int i:a)
{
System.out.println(i);
}
}
}

[/sourcecode]

April 2, 2020 by Aatul Palandurkar Java Source Code Java Tutorials 0

Pattern Programs in Java – Pattern 3

Pattern 3 :

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

Java Code for above pattern :

[sourcecode lang=”java”]

import java.util.Scanner;

public class Pattern3

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

//Taking rows value from the user

System.out.println("How many rows you want in this pattern?");

int rows = sc.nextInt();

System.out.println("Here is your pattern….!!!");

//Printing upper half of the pattern

for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(j+" ");

}

System.out.println();

}

//Printing lower half of the pattern

for (int i = rows-1; i >= 1; i–)

{

for (int j = 1; j <= i; j++)

{

System.out.print(j+" ");

}

System.out.println();

}

//Closing the resources

sc.close();

}

[/sourcecode]

Output :

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

June 13, 2018 by Aatul Palandurkar How to's Java Source Code Java Tutorials 0

Pattern Programs in Java – Pattern 2

Pattern 2 :

1
2 2
3 3 3
4 4 4 4
5 5 5 5 5

Java Program for the above pattern:

[sourcecode language=”java”]

import java.util.Scanner;

public class MainClass

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

//Taking rows value from the user
System.out.println("How many rows you want in this pattern?");

int rows = sc.nextInt();

System.out.println("Here is your pattern….!!!");

for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(i+" ");

}

System.out.println();

}

//Close the resources
sc.close();

}

[/sourcecode]

June 11, 2018 by Aatul Palandurkar How to's Java Source Code Java Tutorials 0

Pattern Programs In Java – Pattern 1

Q. Write a Java program to print given pattern.

Pattern 1 :

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7

Java Program:

[sourcecode language=”java”]

import java.util.Scanner;

public class MainClass

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

//Taking rows value from the user

System.out.println("How many rows you want in this pattern?");

int rows = sc.nextInt();

System.out.println("Here is your pattern….!!!");

for (int i = 1; i <= rows; i++)

{

for (int j = 1; j <= i; j++)

{

System.out.print(j+" ");

}

System.out.println();

}

//Close the resources

sc.close();

}

[/sourcecode]

May 21, 2018 by Aatul Palandurkar Java Source Code Java Tutorials 0

Learning with uCertify

My Experience with uCertify :

I had an access to uCertify 1Z0-808 – Oracle Certified Associate Java SE 8 Programmer course, and I think it’s a pretty good supplement study guide for the course. The questions and flash cards make good revision and I am especially fond of the exam mode and exam readiness assessment that really helps to determine the how well one grasps the information and concepts. For a technical course of this nature, some labs would help to drive home the real-world application of the skills learn

About Exam:

Oracle Java SE 8 Programmer I exam is designed to certify the competency of Java professionals in developing Java applications, mastering Java data types, operators and decision control structures, and understanding OOPs concepts of Java. Java SE 8 significantly changes the way Java Programmers write code. Earning a Java SE 8 Certification gives you the tools to make the most of the new features within Java SE 8.

The Java SE 8 Oracle Certified Associate (OCA) certification helps you build a basic understanding of Java, while expanding your knowledge of general programming.

The ideal candidate who would earn this certification typically has a technical background and wants to improve programming skills, or may be new to object-oriented programming and Java.

About uCertify:

uCertify is a leading provider of online Test preps, Courses & Labs for IT and Project Management certification exams.Our courses are authored by the industry experts (with 15+ years of experience) and we have a fan base of 600,000 happy customers in 200 countries worldwide.

March 3, 2017 by Aatul Palandurkar Java Tutorials Reviews 1