I am learning java and came upon a small problem, my copy() method will not work. I work based on a UML diagram and I am pretty sure that I’m doing everything correctly. Here is the code: Constructor: copy() method: The error flashes at the parantheses FileName() it says: ‘FileName(java.lang.Strin…
Tag: copy
Need to copy all files from one folder to another using java
Src folder C:temp Dest folder C:temp1 temp has one file (sample.csv)and temp1 folder is empty I need to copy sample.csv to temp1 Note: I cannot specify sample.csv anywhere in code as this name is dynamic. This is working only if I give dummy file inside dest directory. C:temp1dummy.csv (i want to specify only…
Dividing a 1D array into a 2D array
So I have homework that asked me to: Write a method that takes two parameters: an array of integers and an integer that represents a number of elements. It should return a two-dimensional array that results from dividing the passed one-dimensional array into rows that contain the required number of elements. …
Java copy part of InputStream to OutputStream
I have a file with 3236000 bytes and I want to read 2936000 from start and write to an OutputStream I can read and write byte by byte, but it’s to slow (i think) from buffered reading How can do I copy it? Answer should work for you.
How to copy a java.util.List into another java.util.List
I have a List<SomeBean> that is populated from a Web Service. I want to copy/clone the contents of that list into an empty list of the same type. A Google search for copying a list suggested me to use Collections.copy() method. In all the examples I saw, the destination list was supposed to contain the …
How to make a copy of ArrayList object which is type of List?
I studied that Java passes object references by value, and in order to make a local copy of an object I can either do clone() or copy-constructor. I also looked at deep/shallow copy as well as several posts on Stack Overflow. I am looking at this example: Only a few articles I read mention that ArrayList impl…
Eclipse copy/paste entire line keyboard shortcut
Anyone know the keyboard shortcut to copy/paste a line into a new line in Eclipse, without having to highlight the entire line? ctrl-alt-down turns my whole screen upside down (I’m on windows). Interestingly, that’s what’s specified in the windows->preferences. Answer Ctrl-Alt-Down: copie…
How do I copy an object in Java?
Consider the code below: So, I want to copy the dum to dumtwo and change dum without affecting the dumtwo. But the code above is not doing that. When I change something in dum, the same change is happening in dumtwo also. I guess, when I say dumtwo = dum, Java copies the reference only. So, is there any way