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安裝中文字典英文字典辭典工具!
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- How do the post increment (i++) and pre increment (++i) operators work . . .
How do the post increment (i++) and pre increment (++i) operators work in Java? Asked 15 years, 8 months ago Modified 1 year, 5 months ago Viewed 448k times
- What is the Java ?: operator called and what does it do?
Not only in Java, this syntax is available within PHP, Objective-C too In the following link it gives the following explanation, which is quiet good to understand it: A ternary operator is some operation operating on 3 inputs It's a shortcut for an if-else statement, and is also known as a conditional operator In Perl PHP it works as:
- What does the ^ operator do in Java? - Stack Overflow
7 It is the Bitwise xor operator in java which results 1 for different value of bit (ie 1 ^ 0 = 1) and 0 for same value of bit (ie 0 ^ 0 = 0) when a number is written in binary form ex :- To use your example: The binary representation of 5 is 0101 The binary representation of 4 is 0100
- What is the percent % operator in java? - Stack Overflow
What is the percent % operator in java? Asked 8 years, 6 months ago Modified 4 years, 4 months ago Viewed 64k times
- boolean operations - How to use or in Java? - Stack Overflow
The || operator can only be used, in Java, where a boolean (true or false) expression is expected, such as in an if statement like the above So pretty much in an if or a conditional operator (that ? : thing, sometimes called the ternary operator)
- Proper usage of Java -D command-line parameters
184 When passing a -D parameter in Java, what is the proper way of writing the command-line and then accessing it from code? For example, I have tried writing something like this
- What does Java option -Xmx stand for? - Stack Overflow
java -Xmx1024m filename what does -Xmx mean?see here: Java Tool Doc, it says, -Xmxn Specify the maximum size, in bytes, of the memory allocation pool This value must a multiple of 1024 greater than 2MB Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes The default value is 64MB The upper limit for this value will be approximately 4000m on Solaris 7 and Solaris
- What are the -Xms and -Xmx parameters when starting JVM?
The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory For example, starting a JVM like below will start it with 256 MB of memory and will allow the process to use up to 2048 MB
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