diff --git a/Java/CheckNoEvenOrNot.class b/Java/CheckNoEvenOrNot.class
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diff --git a/Java/CheckNoEvenOrNot.java b/Java/CheckNoEvenOrNot.java
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+++ b/Java/CheckNoEvenOrNot.java
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+public class CheckNoEvenOrNot {
+    public static void  main(String[] args){
+      int a = 20;
+
+      if(a % 2 == 0){
+          System.out.println("Number is Even");
+      }else{
+          System.out.println("Number is odd");
+      }
+    }
+}
+    
diff --git a/Java/CheckNoPrimeOrNot.class b/Java/CheckNoPrimeOrNot.class
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diff --git a/Java/CheckNoPrimeOrNot.java b/Java/CheckNoPrimeOrNot.java
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+
+public class CheckNoPrimeOrNot {
+   public static void main(String[] args) {
+       int a = 1;
+     //  int temp = 0;
+
+       for(int i=2; i<=a/2; i++){
+          if(a%i==0){
+                System.out.println("Number Is Prime");
+          }else{
+              System.out.println("Number Is Not Prime");
+          }
+       }
+   }   
+}
diff --git a/Java/FibonacciSeries.class b/Java/FibonacciSeries.class
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diff --git a/Java/FibonacciSeries.java b/Java/FibonacciSeries.java
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+++ b/Java/FibonacciSeries.java
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+public class FibonacciSeries {
+    public static void main(String[] args){
+        int n1=0;
+        int n2=1;
+        int sum;
+        int count = 10;
+
+        System.out.print(n1+" ,"+n2);
+
+        for(int i=2; i<count; i++){
+            sum=n1+n2;
+            System.out.print(", "+sum);
+            n1=n2;
+            n2=sum;
+        }
+    }
+}
diff --git a/Java/SwapNoUsingArthOperator.class b/Java/SwapNoUsingArthOperator.class
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diff --git a/Java/SwapNoUsingArthOperator.java b/Java/SwapNoUsingArthOperator.java
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+++ b/Java/SwapNoUsingArthOperator.java
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+public class SwapNoUsingArthOperator {
+    public static void main(String[] args) {
+        int a=10;
+        int b=20;
+
+        System.out.println("Before Swap" +a+ "," +b);
+
+        a = a^b; //30
+        b = a^b;
+        a = a^b;
+
+        System.out.println("After Swap" +a+ "," +b);
+
+
+    }
+}
diff --git a/Java/SwapTwoNo.class b/Java/SwapTwoNo.class
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diff --git a/Java/SwapTwoNo.java b/Java/SwapTwoNo.java
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+++ b/Java/SwapTwoNo.java
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+class SwapTwoNo{
+    public static void main(String args[]) {
+        int a = 10;
+        int b = 20;
+       int temp;
+        System.out.println("Before Swap:" +a+ " , " +b);
+       
+        temp = a;
+        a = b;
+        b=temp;
+
+        System.out.println("After Swap" +a+ ", " +b);
+    }
+}
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diff --git a/Java/SwapTwoNoWithUsing3rdVariable.class b/Java/SwapTwoNoWithUsing3rdVariable.class
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diff --git a/Java/SwapTwoNoWithUsing3rdVariable.java b/Java/SwapTwoNoWithUsing3rdVariable.java
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+++ b/Java/SwapTwoNoWithUsing3rdVariable.java
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+public class SwapTwoNoWithUsing3rdVariable {
+    public static void main(String[] args) {
+        int a = 10;
+        int b = 20;
+        System.out.println("Before Swap:" +a+ " , " +b);
+
+        a = a+b;  //30
+        b = a-b;  //10
+        a = a-b;  //20
+
+        System.out.println("After Swap:" +a+ " , "+b);
+    }
+}
diff --git a/Java/demo.java b/Java/demo.java
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+++ b/Java/demo.java
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+class demo{
+    public static void main(String[] args){
+        System.out.println("Hello world java");
+    }
+}
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