示例
class Shape{
private String shapeName;
private int numSides;
Shape(String shapeName, int numSides){
this.shapeName = shapeName;
this.numSides = numSides;
}
public String toString(){
return shapeName + " has " + numSides + " sides.";
}
}
class ObjectList{
private Object[] list = new Object[10];
private int numElement = 0;
public void add(Object next){
list[numElement] = next;
numElement++;
}
@Override
public String toString(){
String str="";
int i=0;
while(list[i] != null){
str += list[i]+"\n";
i++;
}
return str;
}
}
public class Driver{
public static void main(String[] args){
ObjectList list = new ObjectList();
Shape square = new Shape("square", 4);
Shape hex = new Shape("hexagon", 6);
list.add(hex);
list.add(square);
System.out.println(list);
}
}