added String concat

Author: sauravjaiswalsj

StringConcat.java

@@ -0,0 +1,12 @@
+import java.util.Scanner;
+class StringConcat{
+public static void main(String[] args){
+Scanner cin=new Scanner(System.in);
+String s1=cin.nextLine();
+String s2=cin.nextLine();
+s1=s1.trim();
+s2=s2.trim();
+String s3=s1.concat(s2);
+System.out.println(s3);
+}
+}