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Java

Java is a high-level, object-oriented language known for its portability and reliability. Mastering Java is key for developers to build scalable, secure software efficiently.

In this course, you will start by mastering the art of problem-solving with simple Java programs, such as the Bottle Filling example. You will learn how to structure your solutions, create execution sheets, and enhance your problem-solving abilities through practical exercises and quizzes. Progressing further, you will learn decision-making and branching in Java, understanding flowcharts, conditional expressions, and their application. You will also learn about Java basics, including the first Java program, fundamentals, conditional statements, and error categories, followed by in-depth lessons on working with Java strings and arrays. 

By the end of this course, you will have a solid understanding of Java programming fundamentals and the ability to solve real-world problems using Java.

Learn to Code: Java for Absolute Beginners

What is displayed on the screen after the following program executes if the user inputs `2` and `5`, respectively?

```java
import java.util.Scanner;
class Test 
{
   public static void main(String args[]) 
   {
      Scanner myObj = new Scanner(System.in);
      String a = myObj.nextLine();
      String b = myObj.nextLine();
      System.out.print(a + b);
   }
}
```

What is displayed on the screen after the following program executes if the user inputs <code>2</code> and <code>5</code>, respectively?
<pre><code class="language-java">import java.util.Scanner;
class Test 
{
 public static void main(String args[]) 
 {
 Scanner myObj = new Scanner(System.in);
 String a = myObj.nextLine();
 String b = myObj.nextLine();
 System.out.print(a + b);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?

```java
class Test 
{
   public static void main(String args[]) 
   {
      int int1 = 19;
      int int2 = 4;
      System.out.print(int1 / int2);
   }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test 
{
 public static void main(String args[]) 
 {
 int int1 = 19;
 int int2 = 4;
 System.out.print(int1 / int2);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?

```java
class Test 
{
   public static void main(String args[]) 
   {
      int num1 = 19;
      int num2 = 4;
      num1 %= num2;
      System.out.print(num1 + " " + num2);
   }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test 
{
 public static void main(String args[]) 
 {
 int num1 = 19;
 int num2 = 4;
 num1 %= num2;
 System.out.print(num1 + &quot; &quot; + num2);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?


```java
class Test 
{
   public static void main(String args[]) 
   {
      int num3 = 3;
      int num4 = 2;
      num3 *= num4;
      System.out.print(num3 + " " + num4);
   }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test 
{
 public static void main(String args[]) 
 {
 int num3 = 3;
 int num4 = 2;
 num3 *= num4;
 System.out.print(num3 + &quot; &quot; + num4);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?


```java
class Test 
{
   public static void main(String args[]) 
   {
      int num5 = 5;
      int num6 = 6;
      num5 /= num6;
      System.out.print(num5 + " " + num6);
   }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test 
{
 public static void main(String args[]) 
 {
 int num5 = 5;
 int num6 = 6;
 num5 /= num6;
 System.out.print(num5 + &quot; &quot; + num6);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?

```java
class Test 
{
   public static void main(String args[]) 
   {
      int a, b;
      a = b = 5;
      System.out.print(a + " " + b);
   }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test 
{
 public static void main(String args[]) 
 {
 int a, b;
 a = b = 5;
 System.out.print(a + &quot; &quot; + b);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?

```java
class Test 
{
    public static void main(String args[]) 
    {
        int c = 5, d = 6;   
        System.out.println(c + " " + d);
    }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test 
{
 public static void main(String args[]) 
 {
 int c = 5, d = 6; 
 System.out.println(c + &quot; &quot; + d);
 }
}
</code></pre>

What is displayed on the screen after the following program executes?
```java
class Test
{
    public static void main(String args[]) 
    {
        int a = 8;
        if (a > 0)
        {
            System.out.print("Positive ");
            if (a % 2 == 0)
            {
                System.out.print("Even number");
            }
            else
            {
                System.out.print("Odd number");
            }
        }
        else
        {
            System.out.print("Negative");
        }
    }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test
{
 public static void main(String args[]) 
 {
 int a = 8;
 if (a &gt; 0)
 {
 System.out.print(&quot;Positive &quot;);
 if (a % 2 == 0)
 {
 System.out.print(&quot;Even number&quot;);
 }
 else
 {
 System.out.print(&quot;Odd number&quot;);
 }
 }
 else
 {
 System.out.print(&quot;Negative&quot;);
 }
 }
}
</code></pre>

What is displayed on the screen after the following program executes?
```java
class Test
{
   public static void main(String args[])
    {
        int a = 12;
        int b = 5;
        if (a >= b)
        {
          System.out.println("True");
        }
        else
        {
          System.out.println("False");
        }
    }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-java">class Test
{
 public static void main(String args[])
 {
 int a = 12;
 int b = 5;
 if (a &gt;= b)
 {
 System.out.println(&quot;True&quot;);
 }
 else
 {
 System.out.println(&quot;False&quot;);
 }
 }
}
</code></pre>

It shows `12` and then an error: `java.lang.ArithmeticException: / by zero`

It shows an error: `java.lang.ArithmeticException: / by zero`

What is displayed on the screen after the following program executes?
```Java
class Test
{
  public static void main(String args[])
  {
    int dividend = 12;
    int divisor = 0;
    System.out.print(dividend);
    int quotient = dividend / divisor;
    System.out.println(quotient);
  }
}
```

What is displayed on the screen after the following program executes?
<pre><code class="language-Java">class Test
{
 public static void main(String args[])
 {
 int dividend = 12;
 int divisor = 0;
 System.out.print(dividend);
 int quotient = dividend / divisor;
 System.out.println(quotient);
 }
}
</code></pre>

About the Course

Problem Solving with Simple Programs

Decisions and Branching

Java Basics

Repetition with Loops

Strings and Arrays

Methods

Appendix - Complex Programs

Wrap Up

Quiz on Java Basics