ADDITIONAL JAVA TOPICS - Java Programming: From Problem Analysis to Program Design - page 978

public void setNum( float num)
{

x = num;

}

public float getNum()
{

return x;

}

public void addToNum( float num)
{

x = x + num;

}

public void multiplyToNum( float num)
{

x = x * num;

}
public float compareTo( float num)
{

return (x - num);

}

public boolean equals( float num)
{

if (x == num)
return true;

else

return false;

}

public String toString()
{

return (String.valueOf(x));

}

}

Class: DoubleClass
public class DoubleClass
{

private double x;

public DoubleClass()
{

x = 0;

}

public DoubleClass( double num)
{

x = num;

}