大约有 7,700 项符合查询结果（耗时：0.0298秒） [XML]
Java Serializable Object to Byte Array
...
If you use Java >= 7, you could improve the accepted solution using try with resources:
private byte[] convertToBytes(Object object) throws IOException {
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
Obj...
Check if at least two out of three booleans are true
...!!b+!!c >= 2 to be very safe).
In response to TofuBeer's comparison of java bytecode, here is a simple performance test:
class Main
{
static boolean majorityDEAD(boolean a,boolean b,boolean c)
{
return a;
}
static boolean majority1(boolean a,boolean b,boolean c)
{
...
Any shortcut to initialize all array elements to zero?
...t to initialize an one-dimensional array to a different value, you can use java.util.Arrays.fill() (which will of course use a loop internally).
share
|
improve this answer
|
...
Ship an application with a database
...n order to work with a Sqlite database.)
package android.example;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQL...
Pretty-print a Map in Java
...
Using Java 8 Streams:
Map<Object, Object> map = new HashMap<>();
String content = map.entrySet()
.stream()
.map(e -> e.getKey() + "=\"" + e.getValue() + "\"")
...
Check if a String contains numbers Java
...
The code below is enough for "Check if a String contains numbers in Java"
Pattern p = Pattern.compile("([0-9])");
Matcher m = p.matcher("Here is ur string");
if(m.find()){
System.out.println("Hello "+m.find());
}
...
Are static variables shared between threads?
My teacher in an upper level Java class on threading said something that I wasn't sure of.
7 Answers
...
Convert Enumeration to a Set/List
Is there some one-liner bridge method to dump a given Enumeration to java.util.List or java.util.Set?
6 Answers
...
Why doesn't Java Map extend Collection?
...
From the Java Collections API Design FAQ:
Why doesn't Map extend Collection?
This was by design. We feel that
mappings are not collections and
collections are not mappings. Thus, it
makes little sense for Map to extend
...
How do I convert from int to Long in Java?
...
In Java you can do:
int myInt=4;
Long myLong= new Long(myInt);
in your case it would be:
content.setSequence(new Long(i));
share
|
...