在《thinking in java》这本书中,11章练习7中,要求创建一个类,然后创建一个用你的类的对象进行过初始化的数组。这涉及到用过两个类来初始化一个数组。
首先,创建一个类
class E07_GenerateString {
private static int counter;
private int count=counter++;
public String toString(){
return "E07_GenerateString" +count;
}
}
其次,再创建一个类,通过循环进行数组的创建。
public class E07_TestList {
public static void main(String[] args) {
E07_GenerateString[] g=new E07_GenerateString[10];
for(int i=0;i<g.length;i++){
g[i]=new E07_GenerateString();
//m.out.println(g);
}
List<E07_GenerateString> list=new ArrayList<E07_GenerateString>(Arrays.asList(g));
System.out.println("list "+list);
List<E07_GenerateString> sub=list.subList(1, 5);
System.out.println("sublist "+sub);
list.remove(sub);
System.out.println(list);
}
}
运行结果:
list [E07_GenerateString0, E07_GenerateString1, E07_GenerateString2, E07_GenerateString3, E07_GenerateString4, E07_GenerateString5, E07_GenerateString6, E07_GenerateString7, E07_GenerateString8, E07_GenerateString9]
sublist [E07_GenerateString1, E07_GenerateString2, E07_GenerateString3, E07_GenerateString4]
[E07_GenerateString0, E07_GenerateString1, E07_GenerateString2, E07_GenerateString3, E07_GenerateString4, E07_GenerateString5, E07_GenerateString6, E07_GenerateString7, E07_GenerateString8, E07_GenerateString9]