java语言建立顺序表

 1 package datastructure;
 2 //线性表
 3 
 4 public interface IList {
 5     public void clear();
 6     public boolean isEmpty();
 7     public int length();
 8     public Object get(int i) throws Exception;
 9     public void insert(int i,Object x) throws Exception;
10     public void remove(int i) throws Exception;
11     public int indexOf(Object x);
12     public void display();
13 
14 }

 1 package datastructure;
 2 //顺序表
 3 
 4 public class SqList implements IList {
 5     private Object[] listElem;
 6     private int curLen;
 7     public SqList(int maxSize){
 8         curLen =0;
 9         listElem = new Object[maxSize];
10     }
11     public void clear() {
12         curLen=0;
13     }
14     public boolean isEmpty() {
15         
16         return curLen==0;
17     }
18     public int length() {
19         
20         return curLen;
21     }
22     public Object get(int i) throws Exception {
23         if(i<0||i>curLen-1)
24             throw new Exception("第"+i+"个元素不存在");
25         
26         return listElem[i];
27     }
28     
29     public void insert(int i, Object x) throws Exception {
30         if(curLen==listElem.length)
31             throw new Exception("顺序表已满");
32         if(i<0||i>curLen)
33             throw new Exception("插入位置不合法");
34         for(int j=curLen;j>i;j--)
35             listElem[j]=listElem[j-1];
36            listElem[i]=x;
37            curLen++;
38     }
39     public void remove(int i) throws Exception {
40         if(i<0||i>curLen-1)
41             throw new Exception("删除位置不合法");
42         for(int j=i;j<curLen-1;j++)
43             listElem[j]=listElem[j+1];
44                 curLen--;
45         
46     }
47     public int indexOf(Object x) {
48         int j=0;
49         while(j<curLen&&!listElem[j].equals(x))
50             j++;
51         if(j<curLen)
52             return j;
53         else
54         return -1;
55     }
56     public void display() {
57         for(int j=0;j<curLen;j++)
58             System.out.print(listElem[j]+" ");
59         System.out.println();
60     }
61     
62 }