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How do I convert a String to an int in Java?
How can I convert a String to an int in Java?
46 Answers
46
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java.util.regex - importance of Pattern.compile()?
...);
}
}
If you're familiar with .NET regexes, you may be wondering if Java's compile() method is related to .NET's RegexOptions.Compiled modifier; the answer is no. Java's Pattern.compile() method is merely equivalent to .NET's Regex constructor. When you specify the Compiled option:
Regex r...
Getting the array length of a 2D array in Java
... name of it is - object initialization? inline initialization? one of our Java Gurus will know
– NG.
Oct 22 '10 at 19:59
8
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Eclipse: enable assertions
...nd then to the menu item Run Configurations.
In the left panel, go to Java Application, and then go to Assertions.
In the right panel, choose the tab Arguments.
Under the field for VM arguments, type -ea to enable assertions.
Click on the Apply and then Run button.
To globally set it a...
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 =...
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?
...
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...
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 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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