1 package wy;
2
3 public class feiponaqi {
4 public static void main(String[] args) {
5 int[] arr = new int [30];
6 arr[0] = 1;
7 arr[1] = 1;
8 for(int i = 2;i < arr.length;i++)
9 arr[i] = arr[i-1] + arr[i-2];
10 for(int i : arr)
11 System.out.println(i);
12 }
13
14 }
1 package wy;
2
3 public class xuanze {
4 public static void main(String[] args) {
5 int[] arr={1,3,2,45,65,33,12};
6 System.out.println("交换之前：");
7 for(int num:arr){
8 System.out.print(num+" ");
9 }
10 for(
11 int i = 0; i < arr.length - 1; i++) {
12 int k = i;
13 for(int j = k + 1; j < arr.length; j++){
14 if(arr[j] < arr[k]){
15 k = j;
16 }
17 }
18 if(i != k){
19 int temp = arr[i];
20 arr[i] = arr[k];
21 arr[k] = temp;
22 }
23 }
24
25 System.out.println();
26 System.out.println("交换后：");
27 for(int num:arr){
28 System.out.print(num+" ");
29 }
30 }
31 }
1 package Wy;
2
3 public class maopao {
4 public static void main(String[] args)
5 { int[] arr={12,45,23,67,56,34,99,123};
6 System.out.println("排序前数组为：");
7 for(int num:arr)
8 {
9 System.out.print(num+" ");
10 }
11 for(int i=0;i<arr.length-1;i++){
12 for(int j=0;j<arr.length-1-i;j++){
13 if(arr[j]>arr[j+1]){
14 int temp=arr[j];
15 arr[j]=arr[j+1];
16 arr[j+1]=temp;
17 }
18 }
19 }
20 System.out.println();
21 System.out.println("排序后的数组为：");
22 for(int num:arr){
23 System.out.print(num+" ");
24 }
25 }
26 }
1 package wy;
2
3 public class PersonArray {
4 public static void main(String args[])
5 {
6 person per[]=new person[3];
7 per[0]=new person("张三",20);
8 per[1]=new person("李四",22);
9 per[2]=new person("王五",23);
10 for (int x=0;x<per.length;x++)
11 {
12 per[x].getinfo();
13 }
14 }
15 }
16 class person
17 {
18 private String name;
19 private int age;
20 public person(String name,int age)
21 {
22 this.name=name;
23 this.age=age;
24 }
25 public void getinfo()
26 {
27 System.out.println("姓名: "+this.name+" 年龄: "+this.age);
28 }
29 }
