/* Calculate the product of two integers */

public int mul(int i，int j) {

Return I * j；;

}

/* Calculate the product of two floating-point numbers */

Public double mul(double x, double y) {

Returns x * y；;

}

/* Calculate the product of three floating-point numbers */

Public double mul(double x, double y, double z) {

Returns x * y * z；;

}

}

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Import java.applet.applet;

Import java.awt.graphics;

/* Test and output classes */

Common class test extension applet {

Private strings re 1, re2, re3

public void init() {

Multiplication m = new multiplication ();

Re 1 = (new integer (m.mul (3,4))). toString()；

re2 = (new Double(m.mul(3.3，4.3)))。 toString()；

re3 = (new Double(m.mul(3.3，4.3，5.3)))。 toString()；

}

Public blank paint (figure g)

G. drawing (re 1,100,80);

G. draw rope (re2, 100,100);

G. drawing tape (re3, 100,120);

}

}