/**
*数组的扩容
*往数组里面加东西,数组满了,大小加倍
*/
public class ExpandArray{
private int[] arrays = new int[10];
private int index = 0;
public void show(){
System.out.println(arrays.length);
//扩容
for(index = 0;index<30;index++){
if(index==arrays.length){
this.expand();
System.out.println(index+" "+arrays.length);
for(int i = 0;i < index;i++)
System.out.print(arrays[i]+" ");
System.out.println();
}
arrays[index] = index;
}
}
public void expand(){
int[] arrays2 = new int[arrays.length*2];
System.arraycopy(arrays, 0, arrays2, 0, arrays.length);
arrays = arrays2;
}
public static void main(String[] args) {
ExpandArray ea = new ExpandArray();
ea.show();
}
}