4.3.4

When Reference Types Are the Same

TYPES, VALUES, AND VARIABLES

4.3.4   When Reference Types Are the Same

Two reference types the

same type

 if:

They are both class or both interface types, are loaded by the same class

loader, and have the same fully qualified name ( 6.6), in which case they are

sometimes said to be the

same class

 or the

same interface

.

They are both array types, and have the same component type ( 10).

4.4   Where Types Are Used

Types are used when they appear in declarations or in certain expressions.

The following code fragment contains one or more instances of each kind of

usage of a type:

import java.util.Random;

class MiscMath {

int divisor;

MiscMath(int divisor) {

this.divisor = divisor;

}

float ratio(long l) {

try {

l /= divisor;

} catch (Exception e) {

if (e instanceof ArithmeticException)

l = Long.MAX_VALUE;

else

l = 0;

}

return (float)l;

}

double gausser() {

Random r = new Random();

double[] val = new double[2];

val[0] = r.nextGaussian();

val[1] = r.nextGaussian();

return (val[0] + val[1]) / 2;

}

}

In this example, types are used in declarations of the following:

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