arraylist

Array ArrayList python equivalent

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ArrayList in java and list in python are both dynamic arrays. They both have O(1) average indexing time and O(1) average adding an element to the end time. Array in java is not tuple in python. While it is true that you cannot add elements to both data structures. Python tuple does not support assignment, that is you cannot reassign individual elements in a tuple, … Read more

Print ArrayList

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I have an ArrayList that contains Address objects. How do I print the values of this ArrayList, meaning I am printing out the contents of the Array, in this case numbers. I can only get it to print out the actual memory address of the array with this code:

Best way to convert an ArrayList to a string

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Java 8 introduces a String.join(separator, list) method; see Vitalii Federenko’s answer. Before Java 8, using a loop to iterate over the ArrayList was the only option: DO NOT use this code, continue reading to the bottom of this answer to see why it is not desirable, and which code should be used instead: In fact, a string concatenation is going … Read more

Best way to convert an ArrayList to a string

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Java 8 introduces a String.join(separator, list) method; see Vitalii Federenko’s answer. Before Java 8, using a loop to iterate over the ArrayList was the only option: DO NOT use this code, continue reading to the bottom of this answer to see why it is not desirable, and which code should be used instead: In fact, a string concatenation is going … Read more