diff --git a/Collections/.project b/Collections/.project
index c461daf..5ea0f58 100644
--- a/Collections/.project
+++ b/Collections/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731126</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/Collections/src/com/cdac/collections/collectionsutils/CollectionsDemo.java b/Collections/src/com/cdac/collections/collectionsutils/CollectionsDemo.java
index 954db7a..8b5f045 100644
--- a/Collections/src/com/cdac/collections/collectionsutils/CollectionsDemo.java
+++ b/Collections/src/com/cdac/collections/collectionsutils/CollectionsDemo.java
@@ -8,8 +8,8 @@
import java.util.Map;
import java.util.Set;
-public class CollectionsDemo {
-
+public class CollectionsDemo
+{
public static void main(String[] args) {
ArrayList<String> list = new ArrayList<>();
list.add("One");
@@ -51,14 +51,14 @@ public static void main(String[] args) {
String min = Collections.min(list);
System.out.println("Min Element in the List : "+min);
- List<Integer> iList = new ArrayList<>();
- iList.add(10);
- iList.add(20);
- iList.add(40);
- iList.add(30);
+ List<Integer> indexList = new ArrayList<>(); //iList name is not understadable can be converted to List 2 or IndexList
+ indexList.add(10);
+ indexList.add(20);
+ indexList.add(40);
+ indexList.add(30);
//Binary Search in List Collection
- int index = Collections.binarySearch(iList, 190);
+ int index = Collections.binarySearch(indexList, 190);
System.out.println("Binary Search of 190 index is : "+index);
//Copy one list to another list
@@ -71,36 +71,60 @@ public static void main(String[] args) {
newList.add(14);
newList.add(15);
//newList should have minimum size as iList
- Collections.copy(newList, iList);
+ Collections.copy(newList, indexList);
System.out.println("Copying the list from another list : "+newList);
- //Creating Immutable Collection
- Set<String> emptySet = Collections.emptySet();
- List<String> emptyList = Collections.emptyList();
- Map<String, String> emptyMap = Collections.emptyMap();
- System.out.println("Creating immutable collection (list, set, map)");
- System.out.println("Empty Set : "+emptySet.size());
- //emptySet.add("Try"); //not allowed its immutable
-
- //replacing all the elements with the new value
- Collections.replaceAll(iList, 10, 100);
- System.out.println("Replacing all the 10 in the list with 100 :");
- System.out.println(iList);
-
- //shuffling the list
- Collections.shuffle(iList);
- System.out.println("Shuffle the Elements in the List : ");
- System.out.println(iList);
+
+
+ methodCalling(indexList); //Calling all methods from one place
- //Creating singleton Collection Set, List, Map
- Set<String> singletonSet = Collections.singleton("Java");
- System.out.println("Creating singleton Collection : ");
- System.out.println(singletonSet);
-// singletonSet.add("Hello"); //not supported its immutable
+ }
+
+ static void methodCalling(List<Integer> indexList)
+ {
+ immutableCollection(); // Extracted Method
+ replaceAndShuffle(indexList); // Extracted Method
+ singletonCollection(); // Extracted Method
+ synchronizedCollection(); // Extracted Method
+ }
+ static void immutableCollection()
+ {
+ //Creating Immutable Collection
+ Set<String> emptySet = Collections.emptySet();
+ List<String> emptyList = Collections.emptyList();
+ Map<String, String> emptyMap = Collections.emptyMap();
+ System.out.println("Creating immutable collection (list, set, map)");
+ System.out.println("Empty Set : "+emptySet.size());
+ //emptySet.add("Try"); //not allowed its immutable
+ }
+
+ static void replaceAndShuffle(List<Integer> indexList)
+ {
+ //replacing all the elements with the new value
+ Collections.replaceAll(indexList, 10, 100);
+ System.out.println("Replacing all the 10 in the list with 100 :");
+ System.out.println(indexList);
+
+ //shuffling the list
+ Collections.shuffle(indexList);
+ System.out.println("Shuffle the Elements in the List : ");
+ System.out.println(indexList);
+ }
+
+ static void singletonCollection()
+ {
+ //Creating singleton Collection Set, List, Map
+ Set<String> singletonSet = Collections.singleton("Java");
+ //singletonSet.add("Hello"); //not supported its immutable
+ System.out.println("Creating singleton Collection : ");
+ System.out.println(singletonSet);
+ }
- //Creating synchronized Collection List, Set, Map
- Map<Integer, String> map = new HashMap<>();
- map = Collections.synchronizedMap(map);
- System.out.println("Creating synchronizing Collection : ");
+ static void synchronizedCollection()
+ {
+ //Creating synchronized Collection List, Set, Map
+ Map<Integer, String> map = new HashMap<>();
+ map = Collections.synchronizedMap(map);
+ System.out.println("Creating synchronizing Collection : ");
}
}
\ No newline at end of file
diff --git a/Collections/src/com/cdac/collections/threadsafe/EmployeeRunnable.java b/Collections/src/com/cdac/collections/threadsafe/EmployeeRunnable.java
index 4670969..b528193 100644
--- a/Collections/src/com/cdac/collections/threadsafe/EmployeeRunnable.java
+++ b/Collections/src/com/cdac/collections/threadsafe/EmployeeRunnable.java
@@ -2,7 +2,8 @@
import java.util.ArrayList;
-public class EmployeeRunnable implements Runnable{
+public class EmployeeRunnable
+{
ArrayList<String> names;
@@ -10,9 +11,6 @@ public EmployeeRunnable(ArrayList<String> list) {
this.names = list;
}
- @Override
- public void run() {
- for(int i=0;i<100;i++)
- names.add("Employee :: "+i);
- }
-}
\ No newline at end of file
+
+}
+//run method moved to MainProgram.java
\ No newline at end of file
diff --git a/Collections/src/com/cdac/collections/threadsafe/MainProgram.java b/Collections/src/com/cdac/collections/threadsafe/MainProgram.java
index 29775ed..583212f 100644
--- a/Collections/src/com/cdac/collections/threadsafe/MainProgram.java
+++ b/Collections/src/com/cdac/collections/threadsafe/MainProgram.java
@@ -1,22 +1,65 @@
package com.cdac.collections.threadsafe;
-
import java.util.ArrayList;
+// import com.cdac.collections.bean.Student;
+// Applying move method run to main program, decreases the complexity of tread running
+public class MainProgram implements Runnable
+{
+ public static void main(String[] args) throws CloneNotSupportedException {
-import com.cdac.collections.bean.Student;
-
-public class MainProgram {
- public static void main(String[] args) throws CloneNotSupportedException {
- ArrayList<String> list = new ArrayList<>();
- EmployeeRunnable employeeRunnable = new EmployeeRunnable(list);
- StudentRunnable studentRunnable = new StudentRunnable(list);
-
- Thread t1 = new Thread(employeeRunnable);
- Thread t2 = new Thread(studentRunnable);
+ Thread t1 = new Thread();
+ Thread t2 = new Thread();
t1.start();
t2.start();
+ ArrayList<String> list = new ArrayList<>();
+ EmployeeRunnable employeeRunnable = new EmployeeRunnable(list);
+ StudentRunnable studentRunnable = new StudentRunnable(list);
-
+
+ }
+ public void run()
+ {
+ ArrayList<String> Employeenames = null;
+ ArrayList<String> Studentnames = null;
+ for(int i=0;i<100;i++)
+ {
+ Employeenames.add("Employee :: "+i);
+ }
+ for(int j =100; j<200;j++)
+ {
+ Studentnames.add("Student :: "+j);
+ }
}
-}
\ No newline at end of file
+
+}
+// class EmployeeRunnable implements Runnable
+// {
+
+// ArrayList<String> names;
+
+// public EmployeeRunnable(ArrayList<String> list) {
+// this.names = list;
+// }
+
+// @Override
+// public void run() {
+// for(int i=0;i<100;i++)
+// names.add("Employee :: "+i);
+// }
+// }
+
+// class StudentRunnable implements Runnable
+// {
+
+// ArrayList<String> names;
+
+// public StudentRunnable(ArrayList<String> list) {
+// this.names = list;
+// }
+// @Override
+// public void run() {
+// for(int i=100;i<200;i++)
+// names.add("Student :: "+i);
+// }
+
diff --git a/Collections/src/com/cdac/collections/threadsafe/StudentRunnable.java b/Collections/src/com/cdac/collections/threadsafe/StudentRunnable.java
index 918a0c5..192b510 100644
--- a/Collections/src/com/cdac/collections/threadsafe/StudentRunnable.java
+++ b/Collections/src/com/cdac/collections/threadsafe/StudentRunnable.java
@@ -2,17 +2,12 @@
import java.util.ArrayList;
-public class StudentRunnable implements Runnable{
-
+public class StudentRunnable
+{
ArrayList<String> names;
-
- public StudentRunnable(ArrayList<String> list) {
+ public StudentRunnable(ArrayList<String> list)
+ {
this.names = list;
}
- @Override
- public void run() {
- for(int i=100;i<200;i++)
- names.add("Student :: "+i);
- }
-
-}
\ No newline at end of file
+}
+//run method moved to MainProgram.java
\ No newline at end of file
diff --git a/EncryptionDecryption/.project b/EncryptionDecryption/.project
index 2197d2e..18368b6 100644
--- a/EncryptionDecryption/.project
+++ b/EncryptionDecryption/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731142</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/EncryptionDecryption/bin/.gitignore b/EncryptionDecryption/bin/.gitignore
deleted file mode 100644
index d728ce5..0000000
--- a/EncryptionDecryption/bin/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-/snippet/
diff --git a/EncryptionDecryption/bin/com/cdac/encrypt/aes/AESEncryption.class b/EncryptionDecryption/bin/com/cdac/encrypt/aes/AESEncryption.class
index 86148c9..b328de9 100644
Binary files a/EncryptionDecryption/bin/com/cdac/encrypt/aes/AESEncryption.class and b/EncryptionDecryption/bin/com/cdac/encrypt/aes/AESEncryption.class differ
diff --git a/EncryptionDecryption/bin/com/cdac/encrypt/aes/encryptdecrypt.class b/EncryptionDecryption/bin/com/cdac/encrypt/aes/encryptdecrypt.class
new file mode 100644
index 0000000..ba1137f
Binary files /dev/null and b/EncryptionDecryption/bin/com/cdac/encrypt/aes/encryptdecrypt.class differ
diff --git a/EncryptionDecryption/bin/snippet/Snippet.class b/EncryptionDecryption/bin/snippet/Snippet.class
new file mode 100644
index 0000000..d3e0080
Binary files /dev/null and b/EncryptionDecryption/bin/snippet/Snippet.class differ
diff --git a/EncryptionDecryption/src/com/cdac/encrypt/aes/AESEncryption.java b/EncryptionDecryption/src/com/cdac/encrypt/aes/AESEncryption.java
index b0db7ce..7169df9 100644
--- a/EncryptionDecryption/src/com/cdac/encrypt/aes/AESEncryption.java
+++ b/EncryptionDecryption/src/com/cdac/encrypt/aes/AESEncryption.java
@@ -14,25 +14,33 @@
*/
public class AESEncryption {
- public static void main(String[] args) {
- final String strToEncrypt = "My text to encrypt";
+ public static void main(String[] args)
+ {
+ final String strToEncrypt = "My text to encrypt";
final String strPssword = "f2fc2007-b24b-4ab5-b62f-8dba873d0341";
- AESEncryption.setKey(strPssword);
- AESEncryption.encrypt(strToEncrypt.trim());
+ encryptdecrypt.setKey(strPssword);
+ //encryptdecrypt is called from main funcation
+ encryptdecrypt.encrypt(strToEncrypt.trim());
System.out.println("String to Encrypt: " + strToEncrypt);
- System.out.println("Encrypted: " + AESEncryption.getEncryptedString());
- final String strToDecrypt = AESEncryption.getEncryptedString();
- AESEncryption.decrypt(strToDecrypt.trim());
+ System.out.println("Encrypted: " + encryptdecrypt.getEncryptedString());
+ final String strToDecrypt = encryptdecrypt.getEncryptedString();
+ encryptdecrypt.decrypt(strToDecrypt.trim());
System.out.println("String To Decrypt : " + strToDecrypt);
- System.out.println("Decrypted : " + AESEncryption.getDecryptedString());
+ System.out.println("Decrypted : " + encryptdecrypt.getDecryptedString());
}
+}
+//class encryptdecrypt increases the readability of the code. So, it is extracted to another new class.
+//funcationality remains the same besides having refactoring
+class encryptdecrypt
+{
private static SecretKeySpec secretKey;
private static byte[] key;
private static String decryptedString;
private static String encryptedString;
- public static void setKey(String myKey) {
+ public static void setKey(String myKey)
+ {
MessageDigest sha = null;
try {
key = myKey.getBytes("UTF-8");
diff --git a/EncryptionDecryption/src/snippet/Snippet.java b/EncryptionDecryption/src/snippet/Snippet.java
index 7aaeb24..9ed82b4 100644
--- a/EncryptionDecryption/src/snippet/Snippet.java
+++ b/EncryptionDecryption/src/snippet/Snippet.java
@@ -1,6 +1,8 @@
package snippet;
-public class Snippet {
- Divisors are
+public class Snippet
+{
+ //Divisors are
}
+//changed snippet.java as code is giving error
diff --git a/ExceptionHandling/.project b/ExceptionHandling/.project
index d1a8803..d585cd8 100644
--- a/ExceptionHandling/.project
+++ b/ExceptionHandling/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731166</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/FileIO/.project b/FileIO/.project
index 178ff18..46e10c7 100644
--- a/FileIO/.project
+++ b/FileIO/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731181</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/Generics/.project b/Generics/.project
index 35f7874..9b430bc 100644
--- a/Generics/.project
+++ b/Generics/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731191</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/InterviewPrograms/.project b/InterviewPrograms/.project
index faaf7d1..a765cf4 100644
--- a/InterviewPrograms/.project
+++ b/InterviewPrograms/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731205</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/InterviewPrograms/src/com/java/strings/CountVowels.java b/InterviewPrograms/src/com/java/strings/CountVowels.java
index 278b85f..a71d3c3 100644
--- a/InterviewPrograms/src/com/java/strings/CountVowels.java
+++ b/InterviewPrograms/src/com/java/strings/CountVowels.java
@@ -31,29 +31,69 @@
* by, cry, crypt, fry, gym, psych, spy
*/
-public class CountVowels {
- public static void main(String[] args) {
+public class CountVowels extends countVow {
+ public static void main(String[] args)
+ {
// String line = "Java Interview Programs";
-// String line = "Hello World!";
+ // String line = "Hello World!";
String line = "Rhythm";
- int count = 0;
-
System.out.println("Given String is :"+line);
line = line.toLowerCase();
- for(char ch : line.toCharArray()){
- switch (ch) {
- case 'a':
- case 'e':
- case 'i':
- case 'o':
- case 'u':
- count++;
- break;
- default:
- break;
- }
- }
- System.out.println("Number of Vowels are :"+count);
+ countVow c = new CountVowels();
+ c.count(line);
+ }
+ @Override
+ int count(String line)
+ {
+ System.out.println("Number of Vowels are :"+count);
+ return 0;
+ }
+}
+
+//extract class
+abstract class countVow
+{
+ static int count = 0;
+ abstract int count(String line);
+}
+class a extends countVow
+{
+ @Override
+ public int count(String line)
+ {
+ return count++; // refactored with Replace conditional with polymorphism
+ }
+}
+class e extends countVow
+{
+ @Override
+ public int count(String line)
+ {
+ return count++; // refactored with Replace conditional with polymorphism
+ }
+}
+class i extends countVow
+{
+ @Override
+ public int count(String line)
+ {
+ return count++; // refactored with Replace conditional with polymorphism
+ }
+}
+class o extends countVow
+{
+ @Override
+ public int count(String line)
+ {
+ return count++; // refactored with Replace conditional with polymorphism
+ }
+}
+class u extends countVow
+{
+ @Override
+ public int count(String line)
+ {
+ return count++; // refactored with Replace conditional with polymorphism
}
}
/*
diff --git a/JavaEnums/.project b/JavaEnums/.project
index 36a5aea..3e26146 100644
--- a/JavaEnums/.project
+++ b/JavaEnums/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731215</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/Networking/.project b/Networking/.project
index bf949aa..2ddd01c 100644
--- a/Networking/.project
+++ b/Networking/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731223</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/Reflections/.project b/Reflections/.project
index d5dae35..92518f1 100644
--- a/Reflections/.project
+++ b/Reflections/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731243</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>
diff --git a/Threads/.project b/Threads/.project
index 35e7365..bf2e10d 100644
--- a/Threads/.project
+++ b/Threads/.project
@@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
+ <filteredResources>
+ <filter>
+ <id>1647954731264</id>
+ <name></name>
+ <type>30</type>
+ <matcher>
+ <id>org.eclipse.core.resources.regexFilterMatcher</id>
+ <arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+ </matcher>
+ </filter>
+ </filteredResources>
</projectDescription>