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What is the equivalent of the C++ Pair in Java?
...
In a thread on comp.lang.java.help, Hunter Gratzner gives some arguments against the presence of a Pair construct in Java. The main argument is that a class Pair doesn't convey any semantics about the relationship between the two values (how do ...
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
...y.
Object element = array[index];
}
See also:
The Java Tutorials - Language Basics - Arrays
Update: as per your code snippet,
for (int i = 0; i<=name.length; i++) {
The index is inclusive the array's length. This is out of bounds. You need to replace <= by <.
for (int i = 0...
Check empty string in Swift?
...e 11.3 swift 5.2 and later
Use
var isEmpty: Bool { get }
Example
let lang = "Swift 5"
if lang.isEmpty {
print("Empty string")
}
If you want to ignore white spaces
if lang.trimmingCharacters(in: .whitespaces).isEmpty {
print("Empty string")
}
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Get generic type of class at runtime
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I am getting java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType for this answer.
– Tomáš Zato - Reinstate Monica
May 1 '15 at 13:14
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How do I copy an object in Java?
...You must control the code in all classes.
For example org.apache.commons.lang.SerializationUtils will have method for Deep clone using serialization(Source). If we need to clone Bean then there are couple of utility methods in org.apache.commons.beanutils (Source).
cloneBean will Clone a bean ba...
Easy way of running the same junit test over and over?
... //your test code goes here
}
}
Repeat.java
import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.METHOD;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Ret...
Show all Elasticsearch aggregation results/buckets and not just 10
...eference/current/returning-only-agg-results.html
"aggs" : {
"langs": {
"composite" : {
"size": ITEMS_PER_PAGE,
"sources" : [
{ "language": { "terms" : { "field": "language" } } }
]
}
...
Why doesn't String switch statement support a null case?
...null at run time. In the judgment of the designers of the Java programming language, this is a better outcome than silently skipping the entire switch statement or choosing to execute the statements (if any) after the default label (if any).
(emphasis mine)
While the last sentence skips over the po...
Is it good practice to use java.lang.String.intern()?
The Javadoc about String.intern() doesn't give much detail. (In a nutshell: It returns a canonical representation of the string, allowing interned strings to be compared using == )
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Left padding a String with Zeros [duplicate]
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String paddedString = org.apache.commons.lang.StringUtils.leftPad("129018", 10, "0")
the second parameter is the desired output length
"0" is the padding char
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