User`s manual

Creating and Using Java Objects

5-13

Concatenating Objects of the Same Class

If all of the objects being operated on are of the same Java class, then the

concatenation of those objects produces an array of objects from the same class.

In the following example, the

cat function concatenates two objects of the class

java.awt.Point. The class of the result is also java.awt.Point.

point1 = java.awt.Point(24,127);

point2 = java.awt.Point(114,29);

cat(1, point1, point2)

ans =

java.awt.Point[]:

[1x1 java.awt.Point]

Concatenating Objects of Unlike Classes

When you concatenate objects of unlike classes, MATLAB finds one class from

which all of the input objects inherit, and makes the output an instance of this

class. MATLAB selects the lowest common parent in the Java class hierarchy

as the output class.

For example, concatenating objects of

java.lang.Byte, java.lang.Integer,

and

java.lang.Double yields an object of java.lang.Number, since this is the

common parent to the three input classes.

byte = java.lang.Byte(127);

integer = java.lang.Integer(52);

double = java.lang.Double(7.8);

[byte; integer; double]

ans =

java.lang.Number[]:

[ 127]

[ 52]

[7.8000]