Question

How do I write this code from while loop to for loop? (this is the whole code)

NOTE: do not add any import other than:

import java.util.ArrayList;
import java.util.Collection;(collection not collections)
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.HashSet;

code:

public static int frequency(Collection values, int target) {
var iter = values.iterator();
int app = 0;
while (iter.hasNext()) {
if(iter.next() == target) {
app++;
}
}
return app;
}

public static boolean isSorted(List list) {
var iter = list.listIterator();
int prev = 0;
if (iter.hasNext()) {
prev = iter.next();
}
while(iter.hasNext()) {
int curr = iter.next();
if (prev > curr) {
return false;
}
prev = curr;
}
return true;
}

Answer 1

public static int frequency(Collection values, int target) {
    int app = 0;
    for(var iter = values.iterator();iter.hasNext();) {
        if((int)iter.next() == target) {
            app++;
        }
    }
    return app;
}

public static boolean isSorted(List list) {
    var iter = list.listIterator();
    int prev = 0, curr;
    if (iter.hasNext()) {
        prev = (int)iter.next();
    }
    for(;iter.hasNext();prev = curr) {
        curr = (int) iter.next();
        if (prev > curr) {
            return false;
        }
    }
    return true;
}