I am learning looping statements. Can you tell me how 'for-each' works in Java?

0 votes

Consider:

List<String> someList = new ArrayList<String>();
// add "monkey", "donkey", "skeleton key" to someList
for (String item : someList) {
    System.out.println(item);
}

What would the equivalent for loop look like without using the for each syntax?

Apr 17, 2018 in Java by developer_1
• 3,300 points
72 views

1 answer to this question.

0 votes

While programming we often write code that looks like the following:

char[] grades = ....
for(int i = 0; i < grades.length; i++) {   // for i goes from 0 to grades.length
    System.out.print(grades[i]);           // Print grades[i]
}

The foreach syntax allows this common pattern to be written in a more natural and less syntactically noisy way.

for(char grade : grades) {   // foreach grade in grades
    System.out.print(grade); // print that grade
}

Additionally this syntax is valid for objects such as Lists or Sets which do not support array indexing, but which do implement the Java Iterable interface.

answered Apr 17, 2018 by Rishabh
• 3,540 points

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