2. write java code;
Public class TestBigInteger {
Public static void main(String[] args) {
big integer bint = new big integer(string . value of( 123))；
}
}
3. Write the output result code;
system . out . println(bint)；
system . out . println(bint . getclass())；
4, the execution result, the type is' classjava.math.biginteger';