how does for each loop work 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

int [] intArray = { 10, 20, 30, 40, 50 };
        
for( int value : intArray ) {
   System.out.println( value );
}

Example 3: how to do for each in java

for(int i : alist)
{
  i+=1
}