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Printing HashMap In Java
...();
System.out.println(key + " " + value);
}
Update for Java8:
example.entrySet().forEach(entry->{
System.out.println(entry.getKey() + " " + entry.getValue());
});
If you don't require to print key value and just need the hashmap value, you can use others' suggesti...
What's the (hidden) cost of Scala's lazy val?
...he scala mailing list and gives implementation details of lazy in terms of Java code (rather than bytecode):
class LazyTest {
lazy val msg = "Lazy"
}
is compiled to something equivalent to the following Java code:
class LazyTest {
public int bitmap$0;
private String msg;
public String m...
Mail multipart/alternative vs multipart/mixed
...ine image
inline image
attachment
attachment
And the code is:
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.URLDataSource;
import javax.mail.BodyPart;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.interne...
OpenJDK availability for Windows OS [closed]
...rsion available to Windows OS? From the OpenJDK home page ( http://openjdk.java.net/ ) it redirects to Oracle Sun JRE for Windows machine.
...
Why cannot cast Integer to String in java?
...
No. Every object can be casted to an java.lang.Object, not a String. If you want a string representation of whatever object, you have to invoke the toString() method; this is not the same as casting the object to a String.
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Java `final` method: what does it promise?
In a Java class a method can be defined to be final , to mark that this method may not be overridden:
5 Answers
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How do I convert a Java 8 IntStream to a List?
... methods. This is done by adding the Collectors class in Preferences -> Java -> Editor -> Content Assist -> Favorites. After this, you only have to type toLi at hit Ctr+Space to have the IDE fill in toList and add the static import.
– Lii
Jun 29 '16...
How to append a newline to StringBuilder
...System.getProperty("line.separator") gives you system-dependent newline in java. Also from Java 7 there's a method that returns the value directly: System.lineSeparator()
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How to read contacts on Android 2.0
...in your projection; then you wouldn't have to do a messy simulated join in Java.
– Yoni Samlan
Dec 17 '10 at 16:28
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Dynamic type languages versus static type languages
...tion, dynamic loading, mobile code, runtime reflection" can all be done in Java, just for the record.
– Will Hartung
Sep 24 '08 at 6:11
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