After some research I discovered how to use a BigInteger to calculate larger terms in the Fibonacci sequence as shown in prog65 below:
andrew@UBUNTU:~/Java$ cat prog65.java
import java.math.BigInteger;
public class prog65
{
public static void main (String args[])
{
BigInteger x = BigInteger.valueOf(1);
BigInteger y = BigInteger.valueOf(1);
int term;
for (int z=1; z<=50; z++)
{
term = 2*z-1;
System.out.println("Term " + term + " = " + x);
term++;
System.out.println("Term " + term + " = " + y);
x = x.add(y);
y = x.add(y);
}
}
}
andrew@UBUNTU:~/Java$ javac prog65.java
andrew@UBUNTU:~/Java$ java prog65
Term 1 = 1
Term 2 = 1
Term 3 = 2
Term 4 = 3
Term 5 = 5
Term 6 = 8
Term 7 = 13
Term 8 = 21
Term 9 = 34
Term 10 = 55
Term 11 = 89
Term 12 = 144
Term 13 = 233
Term 14 = 377
Term 15 = 610
Term 16 = 987
Term 17 = 1597
Term 18 = 2584
Term 19 = 4181
Term 20 = 6765
Term 21 = 10946
Term 22 = 17711
Term 23 = 28657
Term 24 = 46368
Term 25 = 75025
Term 26 = 121393
Term 27 = 196418
Term 28 = 317811
Term 29 = 514229
Term 30 = 832040
Term 31 = 1346269
Term 32 = 2178309
Term 33 = 3524578
Term 34 = 5702887
Term 35 = 9227465
Term 36 = 14930352
Term 37 = 24157817
Term 38 = 39088169
Term 39 = 63245986
Term 40 = 102334155
Term 41 = 165580141
Term 42 = 267914296
Term 43 = 433494437
Term 44 = 701408733
Term 45 = 1134903170
Term 46 = 1836311903
Term 47 = 2971215073
Term 48 = 4807526976
Term 49 = 7778742049
Term 50 = 12586269025
Term 51 = 20365011074
Term 52 = 32951280099
Term 53 = 53316291173
Term 54 = 86267571272
Term 55 = 139583862445
Term 56 = 225851433717
Term 57 = 365435296162
Term 58 = 591286729879
Term 59 = 956722026041
Term 60 = 1548008755920
Term 61 = 2504730781961
Term 62 = 4052739537881
Term 63 = 6557470319842
Term 64 = 10610209857723
Term 65 = 17167680177565
Term 66 = 27777890035288
Term 67 = 44945570212853
Term 68 = 72723460248141
Term 69 = 117669030460994
Term 70 = 190392490709135
Term 71 = 308061521170129
Term 72 = 498454011879264
Term 73 = 806515533049393
Term 74 = 1304969544928657
Term 75 = 2111485077978050
Term 76 = 3416454622906707
Term 77 = 5527939700884757
Term 78 = 8944394323791464
Term 79 = 14472334024676221
Term 80 = 23416728348467685
Term 81 = 37889062373143906
Term 82 = 61305790721611591
Term 83 = 99194853094755497
Term 84 = 160500643816367088
Term 85 = 259695496911122585
Term 86 = 420196140727489673
Term 87 = 679891637638612258
Term 88 = 1100087778366101931
Term 89 = 1779979416004714189
Term 90 = 2880067194370816120
Term 91 = 4660046610375530309
Term 92 = 7540113804746346429
Term 93 = 12200160415121876738
Term 94 = 19740274219868223167
Term 95 = 31940434634990099905
Term 96 = 51680708854858323072
Term 97 = 83621143489848422977
Term 98 = 135301852344706746049
Term 99 = 218922995834555169026
Term 100 = 354224848179261915075
andrew@UBUNTU:~/Java$
