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java.net.ConnectException: localhost/127.0.0.1:8080 - Connection refused
I am using xampp apache server to serve resources to the application from my machine. But i am getting the above error.
10...
Gradle proxy configuration
... work for me. I had to set the options (-Dhttp.proxyHost and the likes) as JAVA_OPTS environment variable in order to make it work.
– GoldenD
Sep 14 '18 at 3:01
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ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
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From the Java 11 BigDecimal docs:
When a MathContext object is supplied with a precision setting of 0 (for example, MathContext.UNLIMITED), arithmetic operations are exact, as are the arithmetic methods which take no MathContext obje...
Scanner vs. StringTokenizer vs. String.Split
I just learned about Java's Scanner class and now I'm wondering how it compares/competes with the StringTokenizer and String.Split. I know that the StringTokenizer and String.Split only work on Strings, so why would I want to use the Scanner for a String? Is Scanner just intended to be one-stop-shop...
Android SDK Manager Not Installing Components
...wed by an empty package list. The SDK, it seems, was trying to use legacy Java installation. Setting the JAVA_HOME to the 1.6 jdk did the trick.
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How to get the last value of an ArrayList
...implemented with head and tail references. Is there a similar mechanism in Java?
– Brady
Oct 13 '14 at 9:18
26
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Can we instantiate an abstract class?
...th your classes. Suppose you put those classes in two different files:
My.java:
abstract class My {
public void myMethod() {
System.out.print("Abstract");
}
}
Poly.java:
class Poly extends My {
public static void main(String a[]) {
My m = new My() {};
m.myMet...
How to decompile an APK or DEX file on Android platform? [closed]
...ecompile an APK file.
Dex2jar - Tools to work with android .dex and java .class files
ApkTool - A tool for reverse engineering Android apk files
JD-GUI - Java Decompiler is a tools to decompile and analyze Java 5 “byte code” and the later versions.
for more how-to-use-dextojar. H...
How do synchronized static methods work in Java and can I use it for loading Hibernate entities?
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"the whole class" is not locked. The Java machine language specification: For a class (static) method, the monitor associated with the Class object for the method's class is used. For an instance method, the monitor associated with this (the object for which the...
UTF-8 byte[] to String
... And if checkstyle says: "Illegal Instantiation: Instantiation of java.lang.String should be avoided.", then what?
– Attila Neparáczki
Oct 29 '14 at 8:58
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