Populate int array with for loop in Java
First you need to define what numbers is, you have only declared it. Then insert the values you want.
Java
E/AndroidRuntime﹕ FATAL EXCEPTION: main
You’re calling findViewById() too early when initializing an activity settings object, likely a member variable. The code you posted doesn’t show that. You can call activity functions really only in onCreate() or later. Also put the findViewById() after setContentView() so it can actually return something other than null.
Whitespace Matching Regex – Java
Yeah, you need to grab the result of matcher.replaceAll():
Error: Module not specified (IntelliJ IDEA)
This is because the className value which you are passing as argument forforName(String className) method is not found or doesn’t exists, or you a re passing the wrong value as the class name. Here is also a link which could help you. 1. https://docs.oracle.com/javase/7/docs/api/java/lang/ClassNotFoundException.html2. https://docs.oracle.com/javase/7/docs/api/java/lang/Class.html#forName(java.lang.String) Update According to the snapshot you have provided this problem … Read more
What is ‘PermSize’ in Java?
A quick definition of the “permanent generation”: “The permanent generation is used to hold reflective data of the VM itself such as class objects and method objects. These reflective objects are allocated directly into the permanent generation, and it is sized independently from the other generations.” [ref] In other words, this is where class definitions … Read more
Variable used in lambda expression should be final or effectively final
A final variable means that it can be instantiated only one time. in Java you can’t reassign non-final local variables in lambda as well as in anonymous inner classes. You can refactor your code with the old for-each loop: Even if I don’t get the sense of some pieces of this code: you call a … Read more
Node cannot be resolved to a type
I’ve seen similar behaviour in the past and know of two possible reasons: Your build path has somehow changed, leaving out your Node class, or the project providing it has compile errors, or similar. Given your description of the problem, this probably isn’t relevant in your case. Some Eclipse screwup. For me, this was always … Read more
Union or intersection of Java Sets
The simplest one-line solution is this: The above solution is destructive, meaning that contents of the original set1 my change.If you don’t want to touch your existing sets, create a new set:
Hibernate – Batch update returned unexpected row count from update: 0 actual row count: 0 expected: 1
Without code and mappings for your transactions, it’ll be next to impossible to investigate the problem. However, to get a better handle as to what causes the problem, try the following: In your hibernate configuration, set hibernate.show_sql to true. This should show you the SQL that is executed and causes the problem. Set the log … Read more
How to use regex in String.contains() method in Java
String.contains String.contains works with String, period. It doesn’t work with regex. It will check whether the exact String specified appear in the current String or not. Note that String.contains does not check for word boundary; it simply checks for substring. Regex solution Regex is more powerful than String.contains, since you can enforce word boundary on … Read more