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Convert list to array in Java [duplicate]
How can I convert a List to an Array in Java?
11 Answers
11
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What is a NullPointerException, and how do I fix it?
What are Null Pointer Exceptions ( java.lang.NullPointerException ) and what causes them?
12 Answers
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How to send SMS in Java
What are the possible ways to send and receive sms from Java application?
16 Answers
1...
java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger for JUnit test case for Java mail
I am using Java Mail API to read and parse emails. It is working fine with Servlet code.
7 Answers
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Attach IntelliJ IDEA debugger to a running Java process
Is it possible to attach the IntelliJ IDEA debugger to a running Java process? If yes, how?
5 Answers
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How to create custom exceptions in Java? [closed]
How do we create custom exceptions in Java?
3 Answers
3
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When do you use Java's @Override annotation and why?
What are the best practices for using Java's @Override annotation and why?
27 Answers
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How to create empty folder in java? [duplicate]
...le you use the .mkdirs() method on a File object: http://www.roseindia.net/java/beginners/java-create-directory.shtml
// Create a directory; all non-existent ancestor directories are
// automatically created
success = (new File("../potentially/long/pathname/without/all/dirs")).mkdirs();
if (!succes...
replace String with another in java
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Try this:
https://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#replace%28java.lang.CharSequence,%20java.lang.CharSequence%29
String a = "HelloBrother How are you!";
String r = a.replace("HelloBrother","Brother");
System.out.println(r);
This...
Calculate size of Object in Java [duplicate]
...zes of data structures) and it seems like there is no method to do this in Java. Supposedly, C/C++ has sizeOf() method, but this is nonexistant in Java. I tried recording the free memory in the JVM with Runtime.getRuntime().freeMemory() before and after creating the object and then recording the...