java中斐波那契数列
时间: 2023-11-29 22:46:02 浏览: 52
以下是Java中实现斐波那契数列的几种方法:
1. 递归实现
```java
public static int fibonacci(int n) {
if (n <= 1) {
return n;
}
return fibonacci(n - 1) + fibonacci(n - 2);
}
```
2. 迭代实现
```java
public static int fibonacci(int n) {
if (n <= 1) {
return n;
}
int fib = 1;
int prevFib = 1;
for (int i = 2; i < n; i++) {
int temp = fib;
fib += prevFib;
prevFib = temp;
}
return fib;
}
```
3. 数组实现
```java
public static int fibonacci(int n) {
if (n <= 1) {
return n;
}
int[] fib = new int[n + 1];
fib[0] = 0;
fib[1] = 1;
for (int i = 2; i <= n; i++) {
fib[i] = fib[i - 1] + fib[i - 2];
}
return fib[n];
}
```
4. 尾递归实现
```java
public static int fibonacci(int n) {
return fibonacci(n, 1, 1);
}
public static int fibonacci(int n, int a, int b) {
if (n == 1) {
return b;
}
return fibonacci(n - 1, b, a + b);
}
```
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