javajshelltypecasting-operator

What is the difference between "int x = (int) x" and "x = (int) x" in java if I assign "double x = 2.3"?

if I assign "double x = 2.3", what is the difference between "int x = (int) x" and "x = (int) x" ? I'm new to java and use python before, in python, if I execute "x = 2.3; x = int(x); print(x)", x is 2.

java:

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python:

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Solution

  • You're re-declaring x, so in the line

    int x = (int)x

    The x on the right is not the same x you previously declared. So its value defaults to 0 so (int)x is 0. You normally wouldn't be able to have two x variables. That's a thing jshell lets you do, but in normal Java you couldn't do.

    See this:

    jshell> double x = 2.3
x ==> 2.3

jshell> int y = (int)x
y ==> 2