My arraylist contains String array objects. How Can I get all values? My code is below,
String cordinates1c,cordinates2l,cordinates2m;
String[] array1={cordinates1c,cordinates2l,cordinates2m};
String[] array2={cordinates1c,cordinates2l,cordinates2m};
ArrayList alist=new ArrayList();
alist.add(array1);
alist.add(array2);
//retreieving
for(int i=0;i<alist.size();i++)
System.out.println("arrayList="+alist.get(i));
if I try to retrieve like above it gives,
07-12 12:42:09.977: INFO/System.out(743): arrayList=[[Ljava.lang.String;@43e11b28]
How to do that?
Arrays should be printed with the help of Arrays.toString()
or Arrays.deepToString()
.
import java.util.Arrays;
public class Test {
public static void main(String[] args) throws Exception {
String[][] a = {{"a", "b", "c"}, {"d", "e"}};
System.out.println(Arrays.deepToString(a));
}
}
for(int i=0;i<alist.size();i++) {
for (String a : alist.get(i)) {
System.out.println(a);
}
}
You have to iterate over the array of strings, too.
ArrayList<String[]> l;
for (String[] a : l) {
for (String s : a) {
System.out.println(s);
}
}
You can iterate over your List
and then use Arrays.toString()
or Arrays.deepToString()
to print array contents
for (String[] eachArray : alist) {
System.out.println("arrayList=" + Arrays.deepToString(eachArray));
}
Hoping that you are trying to print the string in array1
ArrayList<String> alist= (ArrayList<String>) Arrays.asList(array1);
Now print the data from alist.
also have a look into alist.addAll(collection)
But following snippet will add array1 and array2 object to your ArrayList, So retrieval you will get an array object
alist.add(array1);
alist.add(array2);
Are you looking for something like this?
String cordinates1c = "1", cordinates2l = "2", cordinates2m = "3";
String[] array1 = {cordinates1c, cordinates2l, cordinates2m};
String[] array2 = {cordinates1c, cordinates2l, cordinates2m};
List<String []> alist=new ArrayList<String []>();
alist.add(array1);
alist.add(array2);
for (String[] strings : alist) {
System.out.println(StringUtils.join(strings));
}
Output: 123 123
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