package safearraydemo;

public class SafeArray {
	private int[] arr;
	public SafeArray(){
		this(10);
	}
	
	public SafeArray(int length){
		arr=new int[length];
	}
	
	public void showElement(){
		for(int i:arr){
			System.out.print(i+" ");
		}
	}
	
	public int getElement(int i){
		if(i>=arr.length||i<0){
			System.out.println("索引錯(cuò)誤");
			return 0;
		}
		return arr[i];
	}
	
	public int getlength(){
		return arr.length;
	}
	
	public void setElement(int i,int data){
		if(i>=arr.length||i<0){
			System.out.println("索引錯(cuò)誤");
			return;
		}
		arr[i]=data;
	}

}