Knowing the Class of an Array - Java Language Basics

Java examples for Language Basics:Array

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Description

Knowing the Class of an Array

Demo Code

public class Main {
  public static void main (String[] args){
    int[] iArr = new int[2];
    int[][] iiArr = new int[2][2];
    int[][][] iiiArr = new int[2][2][2];
    /*from   w w  w.  j a  va  2  s  .  c om*/
    String[] sArr  = {"A", "B"} ;
    String[][] ssArr = {{"AA"}, {"BB"}} ;
    String[][][] sssArr = {} ; // A 3D empty array of string

    // Print the class name for all arrays  
    System.out.println("int[]:" + getClassName(iArr));
    System.out.println("int[][]:" + getClassName(iiArr));
    System.out.println("int[][][]:" + getClassName(iiiArr));
    System.out.println("String[]:" + getClassName(sArr));
    System.out.println("String[][]:" + getClassName(ssArr));
    System.out.println("String[][][]:" + getClassName(sssArr));
  }

  // Any java object can be passed to getClassName() method.
  // Since every array is an object, we can also pass an array to this method.
  public static String getClassName(Object obj) {
    // Get the reference of its class
    Class c = obj.getClass();

    // Get the name of the class
    String className = c.getName();
    return className;
  }
}

Result


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