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In Java, what is the best way to determine the size of an object?
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You can use the java.lang.instrument package
Compile and put this class in a JAR:
import java.lang.instrument.Instrumentation;
public class ObjectSizeFetcher {
private static Instrumentation instrumentation;
public static void premain...
How to convert/parse from String to char in java?
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org.apache.commons.lang.StringEscapeUtils.(un)EscapeJava methods are probaby what you want
Answer from brainzzy not mine :
https://stackoverflow.com/a/8736043/1130448
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Converting String to “Character” array in Java
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ArrayUtils is from commons-lang, not JDK, right?
– Eric Wang
Feb 21 '19 at 14:56
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string to string array conversion in java
... an empty string:
String[] ary = "abc".split("");
Yields the array:
(java.lang.String[]) [, a, b, c]
Getting rid of the empty 1st entry is left as an exercise for the reader :-)
Note: In Java 8, the empty first element is no longer included.
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Showing a Spring transaction in log
...springframework.transaction.support.TransactionSynchronizationManager
java.lang.ThreadLocal
java.lang.Class.getMethod()
Code:
private static ThreadLocal<Method> txCheckMethod;
private static String getSpringTransactionInfo() {
if (txCheckMethod == null) {
txCheckMethod = new Th...
How can I increment a date by one day in Java?
...DateUtils from Apache. Check this http://commons.apache.org/proper/commons-lang/javadocs/api-2.6/org/apache/commons/lang/time/DateUtils.html. It is handy especially when you have to use it multiple places in your project and would not want to write your one liner method for this.
The API says:
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Converting an int to a binary string representation in Java?
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There is also the java.lang.Integer.toString(int i, int base) method, which would be more appropriate if your code might one day handle bases other than 2 (binary).
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Parsing JSON array into java.util.List with Gson
...> and then parse the JSON array into that Type, like this:
import java.lang.reflect.Type;
import com.google.gson.reflect.TypeToken;
JsonElement yourJson = mapping.get("servers");
Type listType = new TypeToken<List<String>>() {}.getType();
List<String> yourList = new Gson().fr...
How can I render inline JavaScript with Jade / Pug?
I'm trying to get JavaScript to render on my page using Jade (http://jade-lang.com/)
8 Answers
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compareTo() vs. equals()
... hashcode? You can see that this is not the case: docjar.com/html/api/java/lang/String.java.html (line 1013).
– waxwing
Jun 6 '12 at 9:04
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