java 实现线性表之顺序存储

末蓝、 2022-08-11 00:59 177阅读 0赞

package com.zhiru;
    
    public class MyArrayList {
        private int[]data;
        private int length;
        private int maxLength=100;
        MyArrayList(int size){
            if(size<100){
            length=0;
            data=new int[size];
            }
            else{
                System.out.println("size is too big");
            }
        }
        //init the arraylist with the array a
        MyArrayList(int []a){
            length=0;
            data=new int[maxLength];
            if(a.length<maxLength){
                for(int i=0;i<a.length;i++){
                    data[length++]=a[i];
                }
            }
            else{
                System.out.println("size is too big");
            }
            
        }
        public int getLength(){
            return length;
        }
        public void fill(int val){
            data[length++]=val;
        }
        //set the value on the pos position.
        public void set(int pos,int val){
            if(pos>0&&pos<length)
            data[pos-1]=val;
        }
        public int get(int pos){
            if(pos>0&&pos<length){
                return data[pos-1];
            }
            return 0;
        }
        public void printArray(){
            if(length>0){
                for(int j=0;j<length;j++){
                    System.out.print(data[j]+" ");
                }
                System.out.print("\n");
            }
        }
        public boolean deleteValByPos(int pos){
            boolean o=false;
            if(pos>0&&pos<length+1){
                for(int j=pos-1;j<length-1;j++){
                    //cong kaishi shanchu de wei zhi de hou yi wei kai shi
                    //wang qian fu gai qianmian de zhi.
                    data[j]=data[j+1];
                }
                length--;
                o=true;
            }
            return o;
            
        }
        public boolean deleteValByVal(int val){
            int m;
            for( m=0;m<length;m++){
                if(data[m]==val)
                    break;
            }
            // still use the method deleteValByPos to delete the val.
            return deleteValByPos(m+1);
        }
        public boolean insertToArray(int pos,int val){
            boolean o=false;
            if(pos<1||pos>length){
                System.err.print("wrong");
            } else{
                for(int j=length;j>=pos+1;j--){
                    data[j]=data[j-1];
                }
                length++;
                data[pos]=val;
                o=true;
            }
            return o;
        }
        //if the data is empty 
        public boolean isEmpty(){
            return length==0;
        }
        //return the position of the value given
        //position=[0,length-1]
        public int Locate(int val){
            int i=0;
            while(i<=length){
                if(val==data[i])
                    break;
                else
                    i++;
            }
            return i;
        }
        // decide whether the value is the data[] member.
        //exists true,else false.
        public boolean isExists(int val){
            boolean o=false;
            int index=Locate(val);
            if(index>length)
                o=false;
            else
                o=true;
            return o;
        }
        public void jiaoJi(MyArrayList ml){
            //i is the index of this object.
            //j is the index of ml's object
            int []x=new int[((this.length+1)<(ml.length+1)?(this.length+1):(ml.length+1))];
            int i=0,index=0;
            while(i<=this.length){
                if(ml.isExists(this.data[i])){
                    x[index++]=this.data[i];
                }
                i++;    
            }
            System.out.print("交集为:\n");
            for(int ind=0;ind<index;ind++)
                System.out.print(x[ind]+" ");
            System.out.print("\n");
        }
        /*
         * input:MyArrayList object
         * output:they are union.
         */
        public void binJi(MyArrayList ml){
            int mLen=ml.length+1;
            int j=0;
            while(j<mLen){
                if(this.isExists(ml.data[j])==false){
                    this.insertToArray(this.length, ml.data[j]);
                }
                j++;
            }
            System.out.print("并集为:\n");
            for(int i=0;i<this.length+1;i++){
                System.out.print(this.data[i]+" ");
            }
            System.out.print("\n");
        }
    
    }

package com.zhiru;
    
    public class TestArrayList {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            MyArrayList mal=new MyArrayList(20);
            MyArrayList mal1=new MyArrayList(20);
            int []a={1,2,5,6,7,8};
            MyArrayList mal2=new MyArrayList(a);
            for(int i=0;i<10;i++){
                mal.fill(i+1);
                mal1.fill(i+2);
            }
            mal.printArray();
            mal1.printArray();
            mal.jiaoJi(mal1);
            mal.binJi(mal1);
            mal2.printArray();
            System.out.println(mal2.getLength());
            mal2.insertToArray(1, 12);
            mal2.insertToArray(mal2.getLength(), 100);
            mal2.printArray();
            mal2.deleteValByPos(1);
            mal2.printArray();
            mal2.deleteValByPos(7);
            mal2.printArray();
    //        mal2.insertToArray(6, 20);
        }
    
    }

1 2 3 4 5 6 7 8 9 10   
2 3 4 5 6 7 8 9 10 11   
交集为:  
2 3 4 5 6 7 8 9 10 0   
并集为:  
1 2 3 4 5 6 7 8 9 10 11 0   
1 2 5 6 7 8   
6  
1 12 2 5 6 7 8 100   
12 2 5 6 7 8 100   
12 2 5 6 7 8