Added Palindrome number program

palindrome.java

@@ -0,0 +1,28 @@
+import java.io.*;
+
+public class palindrome {
+    public static void main(String[] args) throws IOException {
+        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
+        int num, reversedNum = 0, remainder;
+        System.out.println("Enter a number to check if it is palindrome or not");
+        num = Integer.parseInt(in.readLine());
+
+        // make a copy
+        int originalNum = num;
+
+        // reverse
+        while (num != 0) {
+            remainder = num % 10;
+            reversedNum = reversedNum * 10 + remainder;
+            num /= 10;
+        }
+
+        if (originalNum == reversedNum) {
+            System.out.println(originalNum + " is Palindrome.");
+        } else {
+            System.out.println(originalNum + " is not Palindrome.");
+
+        }
+
+    }
+}

prime.java

@@ -0,0 +1,26 @@
+import java.io.*;
+public class prime {
+    public static void main(String[] args) throws IOException{
+        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
+        int number;
+        boolean flag = false;
+        System.out.println("Enter a number to check if it is prime or not");
+
+        number = Integer.parseInt(in.readLine());
+
+        for (int i = 2; i <= number / 2; ++i) {
+      // condition for nonprime number
+      if (number % i == 0) {
+        flag = true;
+        break;
+      }
+    }
+
+    if (!flag)
+      System.out.println(number + " is a prime number.");
+    else
+      System.out.println(number + " is not a prime number.");
+
+    }
+
+}