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Difference between String#equals and String#contentEquals methods
...y of given string value with any implementation instance of interface java.lang.CharacterSequence (eg, CharBuffer, Segment, String, StringBuffer, StringBuilder )
equals(Object anObject):
Lets you check equality of given string value with any instance of type java.lang.String only
RTFC :)
Sinc...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...tack=0x7fe90d3000-0x7fe90d5000 stackSize=8MB
| held mutexes=
at java.lang.Thread.sleep!(Native method)
- sleeping on <0x0a2ae345> (a java.lang.Object)
at java.lang.Thread.sleep(Thread.java:1031)
- locked <0x0a2ae345> (a java.lang.Object)
//真正导致ANR的问题点，可以发现...
How to extract a substring using regex
...
You don't need regex for this.
Add apache commons lang to your project (http://commons.apache.org/proper/commons-lang/), then use:
String dataYouWant = StringUtils.substringBetween(mydata, "'");
sh...
Java: convert List to a String
... (useful enough as far as I'm concerned to use it in preference to commons-lang), the ability to deal with Maps:
Map<String, Integer> ages = .....;
String foo = Joiner.on(", ").withKeyValueSeparator(" is ").join(ages);
// Outputs:
// Bill is 25, Joe is 30, Betty is 35
which is extremely use...
Best approach to converting Boolean object to string in java
...sumable it was something I must have heard. I've been programming in other languages for the past few years but can't see why using this in production would hurt. Besides System.out.println is for debugging anyway, right?
– jskidd3
May 28 '17 at 13:01
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Convert an array of primitive longs into a List of Longs
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I found it convenient to do using apache commons lang ArrayUtils (JavaDoc, Maven dependency)
import org.apache.commons.lang3.ArrayUtils;
...
long[] input = someAPI.getSomeLongs();
Long[] inputBoxed = ArrayUtils.toObject(input);
List<Long> inputAsList = Arrays.asList(...
What's the best way to inverse sort in scala?
...se of size):
scala> val list = List("abc","a","abcde")
list: List[java.lang.String] = List(abc, a, abcde)
scala> list.sortBy(-_.size)
res0: List[java.lang.String] = List(abcde, abc, a)
scala> list.sortBy(_.size)
res1: List[java.lang.String] = List(a, abc, abcde)
...
How to find nth occurrence of character in a string?
...
Nowadays there IS support of Apache Commons Lang's StringUtils,
This is the primitive:
int org.apache.commons.lang.StringUtils.ordinalIndexOf(CharSequence str, CharSequence searchStr, int ordinal)
for your problem you can code the following: StringUtils.ordinalInde...
How to remove duplicate white spaces in string using Java?
...has been in Java since JDK 1.4. docs.oracle.com/javase/1.4.2/docs/api/java/lang/…, java.lang.String)
– David Moles
Dec 22 '11 at 19:25
3
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Java 8 NullPointerException in Collectors.toMap
...method reference no suitable method found for putAll(java.util.Map<java.lang.Integer,java.lang.Boolean>,java.util.Map<java.lang.Integer,java.lang.Boolean>) method java.util.Map.putAll(java.util.Map) is not applicable (actual and formal argument lists differ in length)
...