listtest.java

用java编的一个画图

//#7.18
//#filename: ListTest.java

import java.util.*;
import java.io.*;

public class ListTest {
	ArrayList arrays = new ArrayList();
	
	public static void main(String[] args) throws Exception{
		System.out.print("请输入开始位置(1--30): ");
		DataInputStream dis = new DataInputStream(System.in);
		String strStart = dis.readLine();
		int start;
		start = Integer.parseInt(strStart);
		ListTest lt = new ListTest(30);
		lt.remove(start,3);
	}
	
	public ListTest(int n) {
		add(n);
	}
	
	public void add(int n) {
		for(int i = 0; i <= n; i++) {
			arrays.add(i,"张" + i);
		}
		arrays.set(0,null);
	}
	
	public void remove(int startPoint,int increasePoint) {	
		arrays.set(startPoint+2,null);	
		for(int i = 1; i < arrays.size(); i++) {
			if(((i) % 3) == 0) {
				arrays.set(i,null);
			}
		}
		
		Iterator it = arrays.iterator();
		String temp;
		while(it.hasNext()) {
			temp = (String)it.next();
			if(temp == null) {
				System.out.println("******");
				continue;
			}
			System.out.println(temp);
		}
	}
	
}