Update README.md

Author: omarbelkady

README.md

@@ -17,7 +17,7 @@ Learn git and github
 
 ### 1- cannot find symbol PART 1
 Raised when you try to call an undeclared variable
-```
+```java
 public class Omar{
     public static void main(String [] args)
     {
@@ -32,7 +32,7 @@ public class Omar{
 
 In line 8 we try to print to the console mean we have set the value of mean but we never declared it
 To solve we do this
-```
+```java
 public class Omar{
     public static void main(String [] args)
     {
@@ -46,7 +46,7 @@ public class Omar{
 ```
 ### 2- cannot find symbol PART 2
 Raised when you try to call an undeclared variable
-```
+```java
 public class Great{
     public static void main(String [] args)
     {
@@ -63,7 +63,7 @@ public class Great{
 
 In line 4 we are incorrectly calling the_best_method but we forget the parenthesis. To fix this error I must place the open and close parenthesis
 
-```
+```java
 public class Great{
     public static void main(String [] args)
     {
@@ -81,7 +81,7 @@ public class Great{
 ### symbol: class Scanner 
 ### location: class Great
 Raised when you are using the scanner
-```
+```java
 public class Great{
     public static void main(String [] args)
     {
@@ -92,7 +92,7 @@ public class Great{
 ```
 
 In line 4 we are using the scanner but we never imported the library that enables us to use it 
-```
+```java
 import java.util.Scanner;
 public class Great{
     public static void main(String [] args)
@@ -106,7 +106,7 @@ public class Great{
 ### 4- class <.x.> is public, should be declared in a file named <X>.jav
 ### Ignore the .x. its <x> how its displayed this error is raised when I do this:
 
-```
+```java
 public class Thebest
 {     
      public static void main(String[] args) {
@@ -119,7 +119,7 @@ public class Thebest
 
 ### 5- < identifier> expected
 This error is raised when I try to write code outside of a method which is unintentionally done.
-```
+```java
     public class Test { 
         System.out.println("Hello!");
 
@@ -131,7 +131,7 @@ This error is raised when I try to write code outside of a method which is unint
 
 To fix I just place the print Statement of hello inside of main
 
-```
+```java
     public class Test { 
         public static void main(String[] args) {
             System.out.println("Hello!");
@@ -143,7 +143,7 @@ To fix I just place the print Statement of hello inside of main
 ### 6- illegal start of expression
 
 An "illegal start of expression" error occurs when the compiler when we start a expression before closing the previous one.
-```
+```java
     public class Test {
         public static void main(String[] args) {
             my_method();
@@ -156,7 +156,7 @@ An "illegal start of expression" error occurs when the compiler when we start a
 ```
 
 To fix this piece of code, I simply add a closing curly brace for the main method. To know we are doing the right thing, just look at the lines of code before the error, there may be a missing closing paranthesis or a missing closing curly brace. This would give us what the error is.
-```
+```java
 public class Test
 {
 	public static void main(String[] args) 
@@ -174,7 +174,7 @@ public class Test
 ### 7- incompatible types
 
 The incompatible types error is raised when we are facing with data type errors. We can overcome this, by converting say a char to an int. We can convert a double to an integer with typecasting. BUt WE CANNOT convert between primitive types and objects. A primitive type is say a: null, undefined, boolean, number, string or char. However objects can be: Arrays, Maps, Sets, Functions, Regular Expression or Date..
-```
+```java
 public class Test 
 {
 	public static void main(String[] args) 
@@ -186,7 +186,7 @@ public class Test
 The above code is an error because we are assigning the string Hello World to the variable num of type int.
 To fix this error I must put a integer within the quotes and use the ParseInt method. This is not a syntax error but a logical error.
 Step 1: Change the String value from Hello, world! to 500
-```
+```java
 public class Test
 {
 	public static void main(String[] args) 
@@ -197,7 +197,7 @@ public class Test
 ```
 
 Step 2: Use parsing to convert the string to an integer
-```
+```java
 public class Test
 {
 	public static void main(String[] args) 
@@ -213,7 +213,7 @@ public class Test
 
 Every method in Java requires that you explicitly state the return type of the method. Even methods that do not return a value must explicitly say void in the method signature, just as the main method does.
 When a method declaration does not contain a return type, this error will occur:
-```
+```java
 public class Test
 {
         public static void main(String[] args) 
@@ -233,7 +233,8 @@ public class Test
 To fix this, simply insert the appropriate return type in the method signature and the error will go away:
 
 
-```public class Test 
+```java
+public class Test 
 {
         public static void main(String[] args) 
 	{
@@ -250,7 +251,7 @@ To fix this, simply insert the appropriate return type in the method signature a
 ### 9-java.lang.ArrayIndexOutOfBoundsException: <X>
 
 An ArrayIndexOutOfBoundsException is thrown when an attempt is made to access an index in an array that is not valid. This means that say an array has 8 elements and we know that the number of elements in index is 7. We start counting at 0. So, if I enter a value of 8 or greater to access, this will raise an error. 
-```
+```java
  public class Test {
         public static void main(String[] args) {
             int[] arr = {1, 2, 3};
@@ -261,8 +262,7 @@ An ArrayIndexOutOfBoundsException is thrown when an attempt is made to access an
     }
 ```
 The code above errored due to the for loop iteration settings. The first element is index 0 which is fine however, the function's output of arr.length of our array named arr of type int is 3. However, we are using the comparison operator of <=. This means less than or equal to. If, we change it to < it will not error. The equal means it will try to access index 3 which is the 4th item in the array which we do not have.
-```
-
+```java
 public class Test {
         public static void main(String[] args) {
             int[] arr = {1, 2, 3};
@@ -277,7 +277,8 @@ public class Test {
 ### 10- StringIndexOutOfBoundsException 
 The exception StringIndexOutOfBoundsException is thrown to the console when an attempt is made to access an index in 
 the String that is not valid. The only valid index of the String we can access is from 0 to the (length of the String-1). This means that if the array 8 elements. The biggest number I can access is 7 not 8. If we enter any number greater than 7 for access will throws an outofBoundsException. This is an error in runtime not compile-time. It is accepted by the compiler because it is a logical error
-``` 
+
+``` java
 public class Test 
 {
         public static void main(String[] args)
@@ -295,7 +296,7 @@ public class Test
 To fix this I simply change the String a declaration in line 7 from index -1 to 1. Then another error, will raise because str.length output is 13. The last index we can access is 12. Then, we must change the datatype of b because the operation will output a character not a string. The fourth change we must make is change 20. The biggest index we can access is 12.
 Therefore the bottom code is bug free
 
-``` 
+```java
 public class Test 
 {
         public static void main(String[] args)
@@ -312,7 +313,7 @@ public class Test
 
 
 ### 11- illegal start of expression
-``` 
+``` java
     public class Omar {     
         public static void main(String[] args) {
             omarMethod(1.0, 2, "Hello!");
@@ -324,8 +325,9 @@ public class Test
     }
     
 ```
+
 This errors because I have called the methods with the specified data types in the wrong order. I must call it in the right order
-```
+```java
 public class Omar 
 {     
         public static void main(String[] args) {
@@ -337,8 +339,9 @@ public class Omar
         }
 }
 ```
+
 ### 12- Left out return statement
-```
+```java
  public class Omar 
 {
 	public static void main(String[] args) 
@@ -355,7 +358,8 @@ public class Omar
 ```
 The above code errors because I have made the function behave like a void but my 3rd keyword indicates my return type should 
 be of type int. To fix this, after storing the computation in a variable. I use the return keyword to return to the console. The output of the computation performed by the method.
-```
+
+```java
 public class Omar 
 {
 	public static void main(String[] args) 
@@ -374,7 +378,7 @@ public class Omar
 
 
 ### - Left out return statement in CASE#2
-```
+```java
  public class Omar 
 {
 	public static void main(String[] args) 
@@ -397,8 +401,9 @@ public class Omar
 	}
  }
 ```
+
 The above lines of code have an error in logic. We should switch the code to this:
- ```
+ ```java
 public class Omar 
 {
 	public static void main(String[] args) 
@@ -423,7 +428,7 @@ public class Omar
 ```
 
 ### 13 - possible loss of precision
-```
+```java
 public class Omar 
 {
         public static void main(String[] args)
@@ -435,7 +440,7 @@ public class Omar
 ```
 There is an error above being raised being we are store double in an integer. An integer can only store 4
 4 bytes in main memory. The value we are storing in it is a double which has a memory size of 8 bytes. The way to solve this issue. We will explictly cast the variable theAwesomePi to an int.
-```
+```java
 public class Omar 
 {
         public static void main(String[] args)
@@ -447,7 +452,7 @@ public class Omar
 ```
 
 ### 14 - Reached end of file while parsing
-```
+```java
 public class Omar 
 {
         public static void main(String[] args)
@@ -462,7 +467,7 @@ public class Omar
 ```
 There is an error above being raised being we are not properly closing our class. To solve this issue we add a closing
 curly brace. After, the closing curly brace of my method.
-```
+```java
 public class Omar 
 {
         public static void main(String[] args)
@@ -480,7 +485,7 @@ public class Omar
 ### 15 - unreachable statement
 
 An "unreachable statement" error takes place when the compiler sees that it is impossible to reacha a certain statement. This is caused by the following code. 
-```
+```java
 public class Omar 
 {
 	public static void main(String[] args) 
@@ -501,7 +506,7 @@ public class Omar
 The compiler will generate a number of errors. The first one to be listed is that it is unable to reach the print statement.
 This is because whenever we create a method and use the keyword return the compiler says you are done with the method therefore, we can exit out of the method and execute the next line of code.
 To fix this error I simply reverse the order of the print statement and the return statement.
-```
+```java
 public class Omar 
 {
 	public static void main(String[] args) 
@@ -521,7 +526,7 @@ public class Omar
 ### 16 - Variable might not have been initialized 
 An variable might not have been initialized error is triggered when we declare a variable and specify its type but
 never give it an initial value;
-```
+```java
    public class Omar 
    {
         public static void main(String[] args) {
@@ -534,7 +539,7 @@ never give it an initial value;
 
 The compiler will generate the error  variable myNum2 might not have been initialized  because we declared it with
 the specified data type but never gave it an initial value. To solve this, I simply give it an initial value.
-```
+```java
 public class Omar 
 {
 	public static void main(String[] args)