Create Parent child relational table structure like : User (Parent) a.Interests (Child of User mapped using user_id,interest_id) b.Profession (Child of User mapped using user_id,profession_id) Company (Parent) a.Product(Child of Company mapped using company_id,product_id) 1 solved What is the ideal way to store customized objects
The following is a suggested implementation, also incorporating the good guidance you got from Frakcool: import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.GridLayout; import java.awt.Point; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.geom.Ellipse2D; import java.awt.geom.Rectangle2D; import java.util.HashMap; import java.util.Map; import javax.swing.ButtonGroup; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.JToggleButton; … Read more
Search for (with regex setting turned on) BeanUtils\.copyProperties\s*\(\s*([\w\_]+)\s*\,\s*([\w\_]+)\s*\)\s*\; And replace with: BeanUtils.copyProperties($2, $1); First escape all literal characters with backslash \ Wherever a space can be found when writing code, match it with 0 or more spaces. That by using \s* Could use [ ]* but \s might be sufficient in this case. Then add … Read more
There is a method for Strings, called replaceAll, which you can use to replace parts of the String, like: “ATGCATGC GTCGTGA .”.replaceAll (“A”, “T”); In the upcomming java9, there is a jshell, ideally suited to test such things. -> “ATGCATGC GTCGTGA .”.replaceAll (“A”, “T”) | Expression value is: “TTGCTTGC GTCGTGT .” | assigned to temporary … Read more
You can’t cast them if they are not realted . The class of the object you’re casting and the class you’re casting it to must be related by inheritance; that is, you can cast an object only to an instance of its class’s sub- or superclass-not to any random class. Side note: Casting downward in … Read more
you can do it with HttpURLConnection connection = null; try { URL url = new URL(“http://stackoverflow.com/”); connection = (HttpURLConnection) url.openConnection(); long start = System.currentTimeMillis(); String jsonResponse = myInputStreamReader(connection.getInputStream()); long finish = System.currentTimeMillis(); long totalTime = finish – start; System.out.println(“Total Time for page load – ” + totalTime); } catch (Exception e) { e.printStackTrace(); } finally … Read more
Instead, use java.time As others stated: This class inheritance is poor design, a flawed hack. Now moot, as this class is now legacy, supplanted by java.time.Instant. Avoid all the old legacy date-time classes found outside the java.time package. For databases, use a driver compliant with JDBC 4.2 or later to directly exchange java.time objects with … Read more
// create a class for comparing name that implements the comparator interface class BooknameComparator implements Comparator{ public int compare(Object o1,Object o2){ Student s1=(Student)o1; Student s2=(Student)o2; return s1.name.compareTo(s2.name); } } // create a class for comparing price class PriceComparator implements Comparator{ public int compare(Object o1,Object o2){ Student s1=(Student)o1; Student s2=(Student)o2; if(s1.price==s2.price) return 0; else if(s1.price>s2.price) return … Read more
What you are asking is not possible. But You can try something else to achieve your goal. 1- Make internet conneciton mandatory for you software to run or check date whenever internet connection is on. 2- Save current date to db or a file securily whenever your software exit. And check this date when your … Read more
The way i see it you have the following two issues with your posted code: There is no import for Toy class in your code. Add that import statement so that java knows what to do with it. Also there are two extra closing curly braces in the end. solved Why am I getting an … Read more
So the idea is to have a parent ArrayList of ArrayList. Every time you call the function, pass along the reference to previous results so they can be consolidated. This is just one out of many ways this can be achieved, but should give you a starting point to optimize further. // Initialize and provide … Read more
I ran your code just as it is, and it printed it both in uppercase and lowercase, but I noticed you had a comment that said //Display the first character, and following it, keyboard.next(). This was the only incorrect part. To print the first letter of a string(in this case the string is city), use … Read more
Thanks to comment of cheffe where he links to another question/answer, I’ve came to the following solution: @Autowired GenericApplicationContext context; private void loadBeans(String beansXml) { XmlBeanDefinitionReader xmlReader = new XmlBeanDefinitionReader(context); xmlReader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_XSD); xmlReader.loadBeanDefinitions(new InputSource(new StringReader(beansXml))); } The problem seems to be the creation of the new GenericApplicationContext. It looks like the beans are only in this … Read more
I understand the question to be why the heap size drops from 1500m (1472000K) to something less (1258752K) even though initial size is set to 1500m. As it turns out, this is well known behavior in long running JVMs, and is related to the PS MarkSweep / Full GC mechanism – See this article for … Read more
Caused by: java.lang.ArrayIndexOutOfBoundsException: length=6; index=6 Means you are trying to access element at index 6 of an array with length 6. But arrays are 0-based indexed, meaning that the first element is in position 0 not 1. So the maximum index in a 6-element array is index 5. Your fault is probably in this line: … Read more