Possible duplicate of : This This This I know, but the reason I still ask this question is I DID NOT UNDERSTAND THOSE ANSWERS. And I also know, that it’s my problem and those contributors did well. Not blaming anyone. I’m a beginner at Android Studio and those answers were definitely not rookie fr…
Tag: java
Escape semi colon in “CREATE OR REPLACE AND COMPILE JAVA” statement
I’m trying to execute the following statement in Navicat, But since ; is treated as a delimiter in SQL query, the query became “incomplete” and results in an error: So how can I execute this statement in Navicat? Answer Store the command as a string and dynamically execute it with an anonymo…
Hibernate many-to-one mapping sets foreign key null
Student has multiple laptops. Student oneToMany Laptop mapping Student.java Laptop.java Main class After saving the object , foreign key in laptop table is setting as null lid lName student_id 100 HP NULL Anyone know where I did wrong mapping due to which I am getting foreign key as null Thanksin advance Answ…
change color of already drawn Graphics object in java AWT not working
Am trying to change color after drawing the object in window, this is what i came up with, am a beginner so this is messy. } The class Figure is an abstract class that is inheriting from java.awt.Frame Any remarks about how to make this code cleaner will be appreciated, thanks. Answer Before you begin on some…
Adding an element to the end of a List in java
I have this array that I converted into a list: How would I go about adding a character to the end of the list since there isn’t a specific add function for Lists? Edit: Both my classes and code Answer you have an array of String and convert it to List of String so you cannot add a char to
JPA Hibernate many to many IllegalStateException
I’m attempting to create a many to many relationship. I have a table ‘library_branch’ and i want to join ‘BookCopies’ which contains ‘bookId’, ‘branchId’ and ‘noOfCopies’. I have an error ErrorMvcAutoConfiguration$StaticView. I’m not sure…
Can this lengthy if-else Java code be improved by using arrays?
I’m trying to simplify this Java code by adding arrays, but I’m having difficulty. The code that I have so far that works: However, it’s kind of a brute-force attack. The spot of difficulty I’m running into is figuring out where to create and pass arrays. Since the code has to read the…
How to generate unique combinations of the alphabet up to length 6?
I am creating a simple program to see which combination of letters generates the most possible words for the NY Times Spelling Bee puzzle. What I have so far is a text file containing 80,000+ words and the below code which naively selects a required char and then generates a random combination of 6 characters…
Passing shell arguments to java
I want to pass input to java in a Bash shell: This is my Java code: The result is: Answer This is more of a shell programming problem. You need to write: This will convert the output of echo to parameters. This will work as along as the output of your program is simple (e.g., a short list of words).
Spring JPA relationships
I have some troubles with Spring JPA relationships. I have two entities: Gift and Candy. And I want user to be able to select available candy and add it to gift. How can I do that using spring jpa? I’ve already tried ‘one to many’ relationship with gift as owning side, and I got “null …