This question already has answers here:
How can I check if a single character appears in a string?
(16 answers)
Closed 9 years ago.
I have a string like :
"\"[\"a\",\"b\", \"c\"]\""
How to convert this to a list of strings
Could you suggest me a nice way of doing it in Java?
str.contains("c") does this job. However did not you think to consult String class documentation first?
Use contains():
if (str.contains("\"c\""))
Related
This question already has answers here:
Java ArrayList to Kotlin Array
(4 answers)
Closed 1 year ago.
So, I try to make a line chart using AAChartModel. I have ArrayList in my code. But in AAchartModel they used an arrayOf instead of ArrayList.
So My Question is, how do I convert from ArrayList to arrayOf ?
arrayOf() returns just an Array. So you can call arrayList.toTypedArray()
This question already has answers here:
Is there a Java equivalent to Python's Easy String Splicing?
(8 answers)
Closed 2 years ago.
I am trying to figure out how to return a selected amount of characters in my java string.
In Python, it is just like
randomVar = "hello"
print(randomVar[1:])
and the output would be "ello".
How do I do the same thing in java?
Thank you!
This can be accomplished with substring()
String a = "hello";
System.out.println(a.substring(1, a.length());
This question already has answers here:
Searching for a sequence of Bytes in a Binary File with Java
(5 answers)
Closed 5 years ago.
I come up an idea to read a byte[] array with the same size of the input, and check one by one. But it seems not very efficient. Is there a way to solve it by using rolling hash?
If you are using java 8 or above please check the
java.util.Optional<T>
The documentation is here
Optional
If I got what you mean correctly
This question already has answers here:
Convert String to KeyEvents
(16 answers)
Closed 7 years ago.
I need a way to do what is described in the first answer to this question: Type a String using java.awt.Robot
Only I would like to avoid using the clipboard. Is there a generic way to do it without?
(Other answers to the question address printing some hard-coded keys, but they don't help me print "Hello, world!")
You can use javax.swing.KeyStroke to transform the characters in your string into keycodes. For each key code, call Robot.keyPress(...), Robot.keyRelease(...) as you are doing in your previous question
This question already has answers here:
Difference between int[] array and int array[]
(26 answers)
Closed 8 years ago.
I have a simply doubt about syntax in Java related with Strings.
Could some one tell me what is the difference between the strings in the following code?
String[] firstS = {"word1","word2"};
String secondS[] = {"word1","word2"};
I can not realize what is the difference because doing some for loop both String have the same output.
Thank you so much.
There is no difference, but the first is often considered better style.