package z public class feiponaqi { public static void main(String[] args) { int[] arr = new int [30]; arr[0] = 1; arr[1] = 1; for(int i = 2;i < arr.length;i++) arr[i] = arr[i-1] + arr[i-2]; for(int i : arr) System.out.println(i); } }
package z;
public class xuanze { public static void main(String[] args) { int[] arr={1,3,2,45,65,33,12}; System.out.println("交换之前:"); for(int num:arr){ System.out.print(num+" "); } for( int i = 0; i < arr.length - 1; i++) { int k = i; for(int j = k + 1; j < arr.length; j++){ if(arr[j] < arr[k]){ k = j; } } if(i != k){ int temp = arr[i];
arr[i] = arr[k]; arr[k] = temp; } } System.out.println(); System.out.println("交换后:"); for(int num:arr){ System.out.print(num+" "); }
}
}
package z;
public class PersonArray {
public static void main(String args[])
{
person per[]=new person[3];
per[0]=new person("张三",20);
per[1]=new person("李四",22);
per[2]=new person("王五",23);
for (int x=0;x<per.length;x++)
{
per[x].getinfo();
}
}
}
person
{
private String name;
private int age;
public person(String name,int age)
{
this.name=name;
this.age=age;
}
public void getinfo()
{
System.out.println("姓名: "+this.name+" 年龄: "+this.age);
}
}