how to implement an array that can pass object in...

i tried to implemented an array that could pass any type in...But i got an error when i compier my code..

it works fine if i only deal with the data type in integer only ...could any one show me how to fix it...thx ..

publicclass MyArray<T>

{

privateint maxNumberElements;//Same as a.length

private T [] a;

privateint numberUsed;//Number of indices currently in use

//set the maximum number of allowable elements to 10

MyArray()

{

maxNumberElements = 10;

//a = new T[ maxNumberElements ];

a = (T[])new Object[maxNumberElements];

numberUsed = 0;

}

//Precondition arraySize > 0

MyArray(int arraySize)

{

if(arraySize < 0)

{

System.out.println("Error Array size zero or negative.");

System.exit(0);

}

maxNumberElements = arraySize;

//a = new T[ maxNumberElements ];

a = (T[])new Object[maxNumberElements];

numberUsed = 0;

}

MyArray(MyArray original)

{

if(original ==null)

{

System.out.println("Fatal Error: aborting program.");

System.exit(0);

}

maxNumberElements = original.maxNumberElements;

numberUsed = original.numberUsed;

for(int i = 0; i < numberUsed; i++)

a[i] = original.a[i];

}

publicvoid add(T newElement)

{

if(numberUsed >= a.length)

{

System.out.println("Error: Adding to a full array.");

System.exit(0);

}

else

{

a[numberUsed] = newElement;

numberUsed++;

}

}

public T getElement(int index)

{

if(index < 0 || index >= numberUsed)

{

System.out.println("Error: illegal or used index.");

System.exit(0);

}

return a[index];

}

publicboolean empty()

{

return (numberUsed == 0);

}

publicboolean full()

{

return (numberUsed == maxNumberElements);

}

publicint getMaxCapacity()

{

return maxNumberElements;

}

publicint getNumberOfElements()

{

return numberUsed;

}

}

>javac MyArray.java

MyArray.java:40: incompatible types

found: java.lang.Object

required: T

a = original.a;

^

Note: MyArray.java uses unchecked or unsafe operations.

Note: Recompile with -Xlint:unchecked for details.

1 error

>Exit code: 1

Message was edited by:

Ivan1238

[4759 byte] By [Ivan1238a] at [2007-11-27 6:15:12]