大约有 7,540 项符合查询结果（耗时：0.0208秒） [XML]
Generate fixed length Strings filled with whitespaces
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Since Java 1.5 we can use the method java.lang.String.format(String, Object...) and use printf like format.
The format string "%1$15s" do the job. Where 1$ indicates the argument index, s indicates that the argument is a String an...
Why are data transfer objects (DTOs) an anti-pattern?
...slightly different format than a native business object.
I know this is a Java-oriented question, but in .NET languages anonymous types, serialization, and LINQ allow DTOs to be constructed on-the-fly, which reduces the setup and overhead of using them.
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How to use JUnit and Hamcrest together?
...g.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
public class EmptyTest {
@Test
public void testIsEmpty() {
List myList = new ArrayList();
assertThat(myList, is(empty()));
}
}
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Most efficient way to cast List to List
...st is a SubClass.
Generic collections do not behave the same as arrays in Java. Arrays are covariant; that is, it is allowed to do this:
SubClass[] subs = ...;
BaseClass[] bases = subs;
This is allowed, because the array "knows" the type of its elements. If someone attempts to store something th...
How to get current time and date in Android
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You could use:
import java.util.Calendar
Date currentTime = Calendar.getInstance().getTime();
There are plenty of constants in Calendar for everything you need.
Edit:
Check Calendar class documentation
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Installation error: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED?
...LL_PARSE_FAILED_MANIFEST_MALFORMED error code is returned by PackageParser.java
when it detects any of a large number of errors in the manifest.xml file.
To isolate the error, look in logcat (when you do the 'adb install foo.apk' command). In the problem I encountered, logcat contained:
W/Activit...
getResourceAsStream() vs FileInputStream
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The java.io.File and consorts acts on the local disk file system. The root cause of your problem is that relative paths in java.io are dependent on the current working directory. I.e. the directory from which the JVM (in your cas...
String contains - ignore case [duplicate]
...toLowerCase,
you can implement your own custom containsIgnoreCase using java.lang.String.regionMatches
public boolean regionMatches(boolean ignoreCase,
int toffset,
String other,
int ooffset,
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HttpURLConnection timeout settings
... the URL takes more then 5 seconds to connect - how is this possible using Java? Here is the code I am using to check if the URL is valid
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R cannot be resolved - Android error
... this would generate the incorrect import statement which would hide the R.java class that is automatically generated when you build.
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