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= Using Java Classes in Jython =

DocumentationAndEducation

<<TableOfContents>>

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=== Array ===
Posted to the Jython-users mailing list by Alfonso Reyes on October 14, 2007<<BR>>

Here is an example of a 3D array. I am not fully satisfied with this implementation but to anybody starting with Jython and Java arrays will clarify lots of things. 

To do:<<BR>>
- the class should automatically instantiate and return the array<<BR>>
- a print method that can print the class or any arrays operating outside the class 

{{{#!python
"""     3D array with class

"""
from java.lang.reflect import Array
import java

class multi:
    def __init__(self, i, j, k):
        self.m = i; self.n = j; self.p = k
        self.arr = Array.newInstance(java.lang.Double.TYPE, [self.m, self.n, self.p] )

    def get(self):
        return self.arr

    def out(self):
        print "printing multidimensional array inside class"
        for i in range(0, self.m, 1):
            for j in range(0, self.n, 1):
                for k in range(0, self.p,1):
                    print self.arr[i][j][k],
                print
            print
        print


def out(arr,m,n,p):
    # TO-DO: one method that can print a class-array and a bare array
    print "printing multidimensional array"
    for i in range(0, m, 1):
        for j in range(0, n, 1):
            for k in range(0, p,1):
                print arr[i][j][k],
            print
        print
    print


tArr = multi(4,3,5)
uArr = tArr.get()

print uArr
tArr.out()
uArr[0][0][0] = 7.77
uArr[3][2][4] = 7.77
out(uArr,4,3,5)        # read what the array contains

}}}