Josephu--Java链表实现

public class Josephu {
    
    public static void main(String[] args) {
        Cyclink cyclink=new Cyclink();
        cyclink.setLen(5);
        cyclink.createLink();
        //cyclink.show();
        cyclink.setK(2);
        cyclink.setM(2);
        cyclink.play();
    }

}

class Child{
    int no;
    Child nextChild=null;
    Child(int no){
        this.no=no;
    }
}

class Cyclink{
    //先定义指向链表对第一个小孩的引用
    //指向第一个小孩的引用  不能动，所以需要定义游标
    Child firstChild=null;
    Child temp=null;
    int len=0;//共有0个人入圈
    int k=0;
    int m=0;
    public void play(){
        
        Child temp=this.firstChild;
        for(int i=1;i<k;i++){
            temp=temp.nextChild;
        }
        while(len!=1){
        for(int j=1;j<m;j++){
             temp=temp.nextChild;
        }
        
        Child temp2=temp;
        while(temp2.nextChild!=temp){
            temp2=temp2.nextChild;
            
        }
        temp2.nextChild=temp.nextChild;
        temp=temp.nextChild;
        this.len--;
        }
        System.out.println(temp.no);
    }
    public void setK(int k){
        this.k=k;
    }
    public void setM(int m){
        this.m=m;
    }
    public void setLen(int len){
        this.len=len;
    }
    public void createLink(){
        for(int i=1;i<=len;i++){                                
            if (i==1) {
                //创建第一个小孩
                Child ch=new Child(i);
                firstChild = ch;
                this.temp = ch;
            } 
            else {
                if(i==len){
                    Child ch=new Child(i);
                    temp.nextChild=ch;
                    temp=ch;
                    temp.nextChild=this.firstChild;
                }                
                else{
                    Child ch = new Child(i);
                    temp.nextChild = ch;
                    temp = ch;
                }
            }
        }
    }
    public void show(){
        Child temp=this.firstChild;
        do{
            System.out.print(temp.no+" ");
            temp=temp.nextChild;
        }while(temp!=this.firstChild);
    }
}