JAVA 面试题集(编程篇) 整理 by rensn 2006-6-3
}
}
3、用 JAVA 实现一种排序,JAVA 类实现序列化的方法(二种)? 如在 COLLECTION 框架中,实现比较要实现什么样的接口?
答:用插入法进行排序代码如下
package test;
import java.util.*;
class InsertSort {
ArrayList al;
public InsertSort(int num,int mod) {
al = new ArrayList(num);
Random rand = new Random();
System.out.println("The ArrayL{
al.add(new Integer(Math.abs(rand.nextInt()) % mod + 1));
System.out.println("al["+i+"]="+al.get(i));
}
}
public void SortIt() {
Integer tempInt;
int MaxSize=1;
for(int i=1;i<al.size();i++) {
tempInt = (Integer)al.remove(i);
if(tempInt.intValue()>=((Integer)al.get(MaxSize-1)).intValue()) {
al.add(MaxSize,tempInt);
MaxSize++;
System.out.println(al.toString());
} else {
for (int j=0;j<MaxSize ;j++ ) {
if (((Integer)al.get(j)).intValue()>=tempInt.intValue()) {
al.add(j,tempInt);
MaxSize++;
System.out.println(al.toString());
break;
}
}
}
}
System.out.println("The ArrayList Sort After:");
for(int i=0;i<al.size();i++) {
System.out.println("al["+i+"]="+al.get(i));
}
}
public static void main(String[] args) {
InsertSort is = new InsertSort(10,100);
is.SortIt();
}
}