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Increase heap size in Java
...o worry if you've chosen incorrectly, if you ask for 5g on a 32 bit system java will complain about an invalid value and quit.
As others have posted, use the cmd-line flags - e.g.
java -Xmx6g myprogram
You can get a full list (or a nearly full list, anyway) by typing java -X.
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java.lang.OutOfMemoryError: Java heap space
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If you want to increase your heap space, you can use java -Xms<initial heap size> -Xmx<maximum heap size> on the command line. By default, the values are based on the JRE version and system configuration. You can find out more about the VM options on the Java websit...
How to send HTTP request in java? [duplicate]
In Java, How to compose a HTTP request message and send it to a HTTP WebServer?
9 Answers
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Failed to load the JNI shared Library (JDK)
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You need a 64-bit trio:
64-bit OS
64-bit Java
64-bit Eclipse
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Eclipse returns error message “Java was started but returned exit code = 1”
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The error message points to a problem with your Java version. Do you have a JDK installed?
Try adding the following (noting the new line):
/!\ make sure, that the -vm option occurs before the -vmargs command.
Everything after -vmargs is passed directly to the JVM.
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What is the difference between canonical name, simple name and class name in Java Class?
In Java, what is the difference between these:
8 Answers
8
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Number of days between two dates in Joda-Time
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tl;dr
java.time.temporal.ChronoUnit.DAYS.between(
earlier.toLocalDate(),
later.toLocalDate()
)
…or…
java.time.temporal.ChronoUnit.HOURS.between(
earlier.truncatedTo( ChronoUnit.HOURS ) ,
later.truncated...
How does the String class override the + operator?
Why in Java you're able to add Strings with the + operator, when String is a class? In the String.java code I did not find any implementation for this operator. Does this concept violate object orientation?
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What are the benefits of Java's types erasure?
...t message with even just the excerpts mentioned thus far:
It's funny when Java users complain about type erasure, which is the only thing Java got right, while ignoring all the things it got wrong.
I get huge benefits (e.g. parametricity) and nil cost (alleged cost is a limit of imagination).
new T...
How to run JUnit test cases from the command line
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For JUnit 5.x it's:
java -jar junit-platform-console-standalone-<version>.jar <Options>
Find a brief summary at https://stackoverflow.com/a/52373592/1431016 and full details at https://junit.org/junit5/docs/current/user-guide/#runn...