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Java default constructor

...ast one constructor, the default constructor is not generated. Reference: Java Language Specification If a class contains no constructor declarations, then a default constructor with no formal parameters and no throws clause is implicitly declared. Clarification Technically it is not the co...
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Android: Remove all the previous activities from the back stack

... The solution proposed here worked for me: Java Intent i = new Intent(OldActivity.this, NewActivity.class); // set the new task and clear flags i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK); startActivity(i); Kotlin val i = Intent(thi...
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Quickest way to convert XML to JSON in Java [closed]

What are some good tools for quickly and easily converting XML to JSON in Java? 6 Answers ...
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Checking for a null int value from a Java ResultSet

In Java I'm trying to test for a null value, from a ResultSet, where the column is being cast to a primitive int type. 1...
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Package structure for a Java project?

Whats the best practice for setting up package structures in a Java Web Application? 7 Answers ...
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Use of Java's Collections.singletonList()?

What is the use of Collections.singletonList() in Java? I understand that it returns a list with one element. Why would I want to have a separate method to do that? How does immutability play a role here? ...
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What is the volatile keyword useful for?

At work today, I came across the volatile keyword in Java. Not being very familiar with it, I found this explanation . 2...
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How to specify a port number in SQL Server connection string?

... I have turned from C# to Java, and this answer saves me. Again. – smwikipedia Apr 3 '15 at 1:10 ...
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Best Java obfuscator? [closed]

I am developing a security software and want to obfuscate my java code so it will become impossible to reverse engineer. What is the most reliable java obfuscator ? ...
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What is the difference between instanceof and Class.isAssignableFrom(…)?

.../ syntax error int.class.isAssignableFrom(int.class) // true See http://java.sun.com/javase/6/docs/api/java/lang/Class.html#isAssignableFrom(java.lang.Class). share | improve this answer ...