diff --git a/constructor/ConstructorClass.java b/constructor/ConstructorClass.java
new file mode 100644
index 0000000..2f6b4fe
--- /dev/null
+++ b/constructor/ConstructorClass.java
@@ -0,0 +1,63 @@
+package constructor;
+
+public class ConstructorClass {
+
+	public static void main(String[] args) {
+		One one = new One();
+		Two two = new Two();
+		Three three = new Three(19, "dev");
+		System.out.println(one.a);
+		System.out.println(two.a);
+		System.out.println(three.a+" "+three.name);
+		one.display();
+		two.display();
+		three.display();
+	}
+
+}
+
+class One{
+
+	//default constructor
+	
+	int a;
+	void display() {
+		System.out.println(a);
+	}
+	
+}
+
+class Two{
+	
+	//no argument constructor
+	public Two(){
+		a = 9;
+	}
+	
+	public Two(int a) {
+		a = this.a;
+		System.out.println("a");
+	}
+	int a;
+	void display() {
+		System.out.println(a);
+	}
+	
+}
+
+
+class Three{
+	int a;
+	String name;
+	
+	//parameterized constructor
+	public Three(int a, String name){
+		this.name = name;
+		this.a = a;
+	}
+	void display() {
+		System.out.println(a);
+		System.out.println(name);
+	}
+	
+}
diff --git a/exceptionsHandling/PracticeExceptionHandling.java b/exceptionsHandling/PracticeExceptionHandling.java
new file mode 100644
index 0000000..2785b52
--- /dev/null
+++ b/exceptionsHandling/PracticeExceptionHandling.java
@@ -0,0 +1,21 @@
+package exceptionsHandling;
+
+public class PracticeExceptionHandling {
+
+	public static void main(String[] args) {
+
+       try {
+    	   int a = 7;
+    	   int b = 0;
+    	   int c = a/b;
+    	   System.out.println(c);
+       }catch(ArithmeticException e) {
+    	   System.out.println(e.getMessage()+" the value of denomenator can't be 0");
+       }
+       finally {
+    	   System.out.println("bye bye");
+       }
+       }
+
+	}
+
diff --git a/staticKeyword/StaticClass.java b/staticKeyword/StaticClass.java
new file mode 100644
index 0000000..48dd420
--- /dev/null
+++ b/staticKeyword/StaticClass.java
@@ -0,0 +1,10 @@
+package staticKeyword;
+
+public class StaticClass {
+	
+	static class Hi{
+		void display() {
+			System.out.println("Hi");
+		}
+	}
+}
diff --git a/staticKeyword/StaticKeyword.java b/staticKeyword/StaticKeyword.java
new file mode 100644
index 0000000..dbff756
--- /dev/null
+++ b/staticKeyword/StaticKeyword.java
@@ -0,0 +1,21 @@
+package staticKeyword;
+
+
+public class StaticKeyword {
+//	static int a = 9;
+//	a = 8;
+	static {
+		
+		System.out.println("inside static block");
+		
+	}
+	public static void main(String[] args) {
+		System.out.println("Hello, My name is dev kumar");
+		staticKeyword.StaticClass.Hi h = new staticKeyword.StaticClass.Hi();
+		h.display();
+		
+	}
+}
+
+
+