array from a seperate class

[sunnny]

Hi,

I want to know how to create an array in a seperate class and then print the contents of an array from an another class. When I try to do this I just get a garbage value when I print the contents of the array in the second class even though I assigned a value to the array. I really need your help!!

Thanks,
Sunny

[prometheuzz]

Hi,

I want to know how to create an array in a seperate class and then print the contents of an array from an another class. When I try to do this I just get a garbage value when I print the contents of the array in the second class even though I assigned a value to the array. I really need your help!!

Thanks,
Sunny

Something like this?

public class PrintArray {
    public static String printIntArray(int[] array) {
        if(array == null || array.length == 0) return "[empty]";
        StringBuffer strb = new StringBuffer("int array: ["+array[0]);
        for(int i = 1; i < array.length; i++) {
            strb.append(", "+array[i]);
        }
        strb.append("]");
        return strb.toString();
    }
}

And to test the class:

public class Test {
    public static void main(String args[]) {
        int[] array = {1,2,3,4,5};
        System.out.println(PrintArray.printIntArray(array));
    }
}

Good luck.

[sjalle]

...the temptation to make this a bit more generic:

public class PrintArray {
  StringBuffer sb = new StringBuffer();
  public String printAnyArray(Object anArray) {

    if (anArray==null) return "[null]";

    sb.setLength(0);
    sb.append("[");

    if (anArray instanceof int[]) {
      int [] ii=(int[])anArray;
      if (ii.length==0) return "[empty]";
      for (int i=0; i<ii.length; i++) sb.append(ii[i]+" ");
    }
    else if (anArray instanceof float[]) {
      float [] ff=(float[])anArray;
      if (ff.length==0) return "[empty]";
      for (int i=0; i<ff.length; i++) sb.append(ff[i]+" ");
    }
    else if (anArray instanceof double[]) {
      double [] dd=(double[])anArray;
      if (dd.length==0) return "[empty]";
      for (int i=0; i<dd.length; i++) sb.append(dd[i]+" ");
    }
    else if (anArray instanceof Object[]) {
      Object [] oo=(Object[])anArray;
      if (oo.length==0)  return "[empty]";
      for (int i=0; i<oo.length; i++) sb.append(oo[i]+" ");
    }

    sb.append("]");
    return sb.toString();
  }

  public static void main(String args[]) {
    PrintArray pA=new PrintArray();
    int[] iArray = {
        1, 2, 3, 4, 5};
    double [] dArray = {
      1.4,1.5,1.6
    };
    String [] strArray= {
        "One","Two","Three"
    };
    CustClass [] ccArray= {
        new CustClass(11),
        new CustClass(22),
        new CustClass(33)
    };
    System.out.println(pA.printAnyArray(iArray));
    System.out.println(pA.printAnyArray(dArray));
    System.out.println(pA.printAnyArray(strArray));
    System.out.println(pA.printAnyArray(ccArray));
  }
}
class CustClass  {
  int val=Integer.MIN_VALUE;
  public CustClass(int val) {
    this.val=val;
  }
  public String toString() {
    return "*"+val+"*";
  }
}