what does for each mean in java code example

Example 1: java for each

//itemset contains variables of type <Data Type>
for(<Data Type> item : itemset) {
  //loop
}

Example 2: for each java

public class JavaArray {

    public static void main(String[] s) {
        int[] age = new int[5];
        age[0] = 21;
        age[1] = 23;
        age[2] = 45;
        age[3] = 31;
        age[4] = 33;
        for (int a : age) {
            System.out.println("age= " + a);
        }

    }
}