for loop java array tutorial code example
Example 1: arrays with for loops
Account[] accounts;
// 1. allocate the array (initially all the pointers are null)
accounts = new Account[100];
// 2. allocate 100 Account objects, and store their pointers in the array
for (int i=0; i<accounts.length; i++) {
accounts[i] = new Account();
}
// 3. call a method on one of the accounts in the array
account[0].deposit(100);
Example 2: arrays with for loops
// Given an array of booleans representing a series
// of coin tosses (true=heads, false=tails),
// returns true if the array contains anywhere within it
// a string of 10 heads in a row.
// (example of a search loop)
public boolean searchHeads(boolean[] heads) {
int streak = 0; // count the streak of heads in a row
for (int i=0; i<heads.length; i++) {
if (heads[i]) { // heads : increment streak
streak++;
if (streak == 10) {
return true; // found it!
}
}
else { // tails : streak is broken
streak = 0;
}
}
// If we get here, there was no streak of 10
return false;
}