大约有 1,633 项符合查询结果（耗时：0.0184秒） [XML]
What causes imported Maven project in Eclipse to use Java 1.5 instead of Java 1.6 by default and how
...ject.testCompileSourceRoots}"/>
<compilerId implementation="java.lang.String" default-value="javac">${maven.compiler.compilerId}</compilerId>
<compilerReuseStrategy implementation="java.lang.String" default-value="${reuseCreated}">${maven.compiler.compilerReuseStrategy}&...
What's invokedynamic and how do I use it?
...r, though, you can use it to build more flexible, more efficient JVM-based languages. Here is a really sweet blog post that gives a lot of detail.
share
|
improve this answer
|
...
Booleans, conditional operators and autoboxing
... null : false` - Boolean (autoboxing of 3rd operand to Boolean)
See Java Language Specification, section 15.25 Conditional Operator ? :
For E1, the types of the 2nd and 3rd operands are Boolean and boolean respectively, so this clause applies:
If one of the second and third operands is of ty...
Get nodes where child node contains an attribute
...
Try
//book[title/@lang = 'it']
This reads:
get all book elements
that have at least one title
which has an attribute lang
with a value of "it"
You may find this helpful — it's an article entitled "XPath in Five Paragraphs" by ...
replace String with another in java
...
Try this:
https://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#replace%28java.lang.CharSequence,%20java.lang.CharSequence%29
String a = "HelloBrother How are you!";
String r = a.replace("HelloBrother","Brother");
System.out.println(r);
This would print out "Brother H...
xpath路径表达式笔记 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ersion="1.0" encoding="ISO-8859-1"?>
<bookstore>
<book>
<title lang="eng">Harry Potter</title>
<price>29.99</price>
</book>
<book>
<title lang="eng">Learning XML</title>
<price>39.95</price>
</book>
</bookstore>
[例1]
bookstore ：选取 bookstore ...
BLE UUID是对的但连接闪退：java.lang.IllegalArgumentException: UUID str...
请问UUID是对的 连接闪退，
下面是报错日志
java.lang.ExceptionInInitializerError
at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.subscribe(BluetoothLEint.java:357)
at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.run(BluetoothLEint.java:325)
at android.os....
How to solve java.lang.NoClassDefFoundError?
...mmend taking advantage of the amazing tooling that exists for Java and JVM languages. Modern IDE's like Eclipse and IDEA and build management tools like Maven or Gradle will help you not have to worry about classpaths (as much) and focus on the code! That said, this link explains how to set the clas...
Check whether a string is not null and not empty
...
Use org.apache.commons.lang.StringUtils
I like to use Apache commons-lang for these kinds of things, and especially the StringUtils utility class:
import org.apache.commons.lang.StringUtils;
if (StringUtils.isNotBlank(str)) {
...
}
if (Strin...
String concatenation: concat() vs “+” operator
...ap -c (included in the Sun JDK). You should see a listing including:
java.lang.String cat(java.lang.String, java.lang.String);
Code:
0: new #2; //class java/lang/StringBuilder
3: dup
4: invokespecial #3; //Method java/lang/StringBuilder."<init>":()V
7: aload_1
8...