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DecimalFormat df = new DecimalFormat("999000"); df.format(10);  will output "999010"

Charset Charset is a named mapping between sequences of sixteen-bit Unicode code units and sequences of bytes. 1 byte = 8 bits, byte represent the int value from 0x00 through 0xFF. In ASC-II, we...

Talk something used to happen in projects.   Java basic Exception   Struts global exception handler design.

Search-->Copy-->Small Modification-->Delivery with product...-->Search again-->Copy and modify again-->...Or Rewrite-->Test-->delivery with product...Rewrite-->Test--&g...

javax.naming.ServiceUnavailableException [Root exception is java.net.UnknownHostException: XXXXX001]   javax.naming.CommunicationException [Root exception is java.net.ConnectException: t3://X.X.X.X:...

Shallow Heap Size Shallow size is the amount of memory allocated to store the object itself, not taking into account the referenced objects. Retained Heap Size Retained size of an object is its s...

ScheduledThreadPoolExecutor Execution periodic         Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given period; tha...

Where ConcurrentModificationException raised Case 1: update value Entries during traverse Map in same Thread java.util.ConcurrentModificationException will be raised in following java code:   Ma...