safearray.java

一些简单的java初学者必学的东西,希望能对你有用.

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.err.println("suoyingwrong");
       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.err.println("suoyingwrong");
            return;
          }
         arr[i]=data;
         }
}