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What is the difference between JVM, JDK, JRE & OpenJDK?
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JVM
The Java Virtual Machine (JVM) is the virtual machine that runs the Java bytecodes. The JVM doesn't understand Java source code; that's why you need compile your *.java files to obtain *.class files that contain the bytecodes und...
Just what is Java EE really? [closed]
Java EE has this "mysterious shroud" around it for younger Java developers - one that I've been trying to lift myself for quite a while with little success.
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Calling startActivity() from outside of an Activity?
...what you want?
at android.app.ContextImpl.startActivity(ContextImpl.java:1597)
at android.app.ContextImpl.startActivity(ContextImpl.java:1584)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:337)
at android.text.style.URLSpan.onClick(URLSpan.java:62)
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
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I think JAVA_HOME is the best you can do. The command-line tools like java and javac will respect that environment variable, you can use /usr/libexec/java_home -v '1.7*' to give you a suitable value to put into JAVA_HOME in order to...
Registry Key '…' has value '1.7', but '1.6' is required. Java 1.7 is Installed and the Registry is P
...the servers. Before the change over we had a JAR that was running fine on Java 1.7 x64 along with JRE 7. When we moved over to the new server our JAR was running alright, but then one of the server admins "updated" our Java to an older version and uninstalled the one we were using. Don't ask me w...
JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
When running any java application, or just 'java', the jvm fails:
27 Answers
27
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How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
How to get timestamp in string format in Java? "yyyy.MM.dd.HH.mm.ss"
7 Answers
7
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Installing Java on OS X 10.9 (Mavericks)
...tain Lion). When I upgraded it to Mac OS X v10.9 (Mavericks) and ran java -version in the terminal, it showed:
11 An...
What are major differences between C# and Java?
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Comparing Java 7 and C# 3
(Some features of Java 7 aren't mentioned here, but the using statement advantage of all versions of C# over Java 1-6 has been removed.)
Not all of your summary is correct:
In Java methods are virtual by d...
Java: Date from unix timestamp
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For 1280512800, multiply by 1000, since java is expecting milliseconds:
java.util.Date time=new java.util.Date((long)timeStamp*1000);
If you already had milliseconds, then just new java.util.Date((long)timeStamp);
From the documentation:
Allocates a Date o...