大约有 7,700 项符合查询结果（耗时：0.0294秒） [XML]
How can I convert ArrayList to ArrayList?
...g(object, null))
.collect(Collectors.toList());
Or when you're not on Java 8 yet:
List<String> strings = new ArrayList<>(list.size());
for (Object object : list) {
strings.add(Objects.toString(object, null));
}
Or when you're not on Java 7 yet:
List<String> strings = n...
Handling exceptions from Java ExecutorService tasks
I'm trying to use Java's ThreadPoolExecutor class to run a large number of heavy weight tasks with a fixed number of threads. Each of the tasks has many places during which it may fail due to exceptions.
...
Is the != check thread safe?
... This is the bytecode for test()
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
ALOAD 0
GETFIELD test/Test1.a : Ljava/lang/Object;
IF_ACMPEQ L1
...
as we can see it loads field a to local vars twice, it's a non-atomic operation, if a was changed in between by another thre...
Select unique or distinct values from a list in UNIX shell script
...mmandline options:
Given the following input:
class
jar
jar
jar
bin
bin
java
uniq will output all lines exactly once:
class
jar
bin
java
uniq -d will output all lines that appear more than once, and it will print them once:
jar
bin
uniq -u will output all lines that appear exactly once,...
Does Java 8 provide a good way to repeat a value or function?
...
Closures will completely transform Java code, for the better. Looking forward to that day...
– Marko Topolnik
Aug 30 '13 at 12:11
1
...
Why doesn't the JVM cache JIT compiled code?
... to take resources from other projects. Given the choice between this and Java 8 lambda+streams I'd rather have the latter.
– Thorbjørn Ravn Andersen
Jan 1 '15 at 19:20
...
写出高质量代码的10个Tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...相关的几点：
掌握好开发语言，比如做Android就必须对Java足够熟悉，《Effective Java》一书就是教授大家如何更好得掌握Java, 写出高质量Java代码。
熟悉开发平台, 不同的开发平台，有不同的API, 有不同的工作原理，同样是Java代...
Java “params” in method signature?
...
In Java it's called varargs, and the syntax looks like a regular parameter, but with an ellipsis ("...") after the type:
public void foo(Object... bar) {
for (Object baz : bar) {
System.out.println(baz.toString());
...
What are the best JVM settings for Eclipse? [closed]
...wsplash
org.eclipse.platform
--launcher.defaultAction
openFile
-vm
C:/Prog/Java/jdk1.6.0_21/jre/bin/server/jvm.dll
-vmargs
-Dosgi.requiredJavaVersion=1.6
-Declipse.p2.unsignedPolicy=allow
-Xms128m
-Xmx384m
-Xss4m
-XX:PermSize=128m
-XX:MaxPermSize=384m
-XX:CompileThreshold=5
-XX:MaxGCPauseMillis=10
-...
When using the Java debugger in Intellij what does “Drop Frame” mean?
I was using the Java debugger within Intellij 8 and noticed a button labeled "drop frame", does anybody know what purpose this serves? How/why would this be used/useful?
...