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Difference between Statement and PreparedStatement
... + "'");
preparedStatement.executeUpdate();
Eases setting of non-standard Java objects in a SQL string, e.g. Date, Time, Timestamp, BigDecimal, InputStream (Blob) and Reader (Clob). On most of those types you can't "just" do a toString() as you would do in a simple Statement. You could even refacto...
Android-java- How to sort a list of objects by a certain value within the object
... When should a class be Comparable and/or Comparator?
Try this -
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class TestSort {
public static void main(String args[]){
ToSort toSort1 = new ToSort(new Float(3), "3");
ToSort toSort2 =...
Comparing Java enum members: == or equals()?
I know that Java enums are compiled to classes with private constructors and a bunch of public static members. When comparing two members of a given enum, I've always used .equals() , e.g.
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How to get the first non-null value in Java?
Is there a Java equivalent of SQL's COALESCE function? That is, is there any way to return the first non-null value of several variables?
...
How to comment a block in Eclipse?
...le "//" comments and Ctrl-Shift-/ to toggle "/* */" comments. At least for Java, anyway - other tooling may have different shortcuts.
Ctrl-\ will remove a block of either comment, but won't add comments.
Note: As for Eclipse CDT 4.4.2, Ctrl-Shift-/ will not uncomment a "/* */" block comment. Use ...
String.format() to format double in java
...alFormat.setRoundingMode(RoundingMode.UP);
Here are the imports:
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
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What is the use of printStackTrace() method in Java?
... e) {
e.printStackTrace();
}
System.exit(0);
Calling println(e):
java.lang.NullPointerException
Calling e.printStackTrace():
java.io.IOException
at package.Test.main(Test.java:74)
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Is Java RegEx case-insensitive?
In Java, when doing a replaceAll to look for a regex pattern like:
5 Answers
5
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How do you import classes in JSP?
I am a complete JSP beginner. I am trying to use a java.util.List in a JSP page. What do I need to do to use classes other than ones in java.lang ?
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Is it possible to view bytecode of Class file? [duplicate]
Java source code is compiled into bytecode, which is actually in the class file. Is it possible to view bytecode of a compiled class?
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