Develop a Java code to take two sorted arrays in ascending order (increasing order) and merge them into a third array in sorted order without using Java inbuilt sorting methods for Array. For example, if the content of the first array is {2,3,6,8,11}, and the content of the second array is {3,5,8,10,12,15}, then the content of the third array should be {2,3,3,5,6,8,8,10,11,12,15}. You must use loops, arrays, and if-else conditionals to achieve this.