package com.abc.text;
public class StringProcessing {
/**
* Returns the number of non-null strings in the set.
* If null or a zero-length array is passed in, then zero is returned.
* If a slot in the array is null, then it is ignored (not counted).
*/
public static int getCount(String[] set) {
}
/**
* Returns the total length of all the non-null strings in the set.
* If null or a zero-length array is passed in, then zero is returned.
* If a slot in the array is null, then it is ignored (not counted).
*/
public static int getTotalLength(String[] set) {
}
/**
* Returns the average length of all the non-null strings in the set.
* If null or a zero-length array is passed in, then zero is returned.
* If a slot in the array is null, then it is ignored (not counted).
*/
public static double getAverageLength(String[] set) {
}
/**
* Returns the length of the shortest, non-null string in the set.
* If null or a zero-length array is passed in, then zero is returned.
* If a slot in the array is null, then it is ignored (not counted).
*/
public static int getShortestLength(String[] set) {
}
/**
* Returns the shortest, non-null string in the set (which was found first).
* If two strings in the set are of the same length, then the first one
* found is the one returned.
* If null or a zero-length array is passed in, then null is returned.
* If a slot in the array is null, then it is ignored (not counted).
* If every slot in the array is null, then null is returned.
*/
public static String getFirstShortest(String[] set) {
}
/**
* Returns the length of the longest, non-null string in the set.
* If null or a zero-length array is passed in, then zero is returned.
* If a slot in the array is null, then it is ignored (not counted).
*/
public static int getLongestLength(String[] set) {
}
/**
* Returns the longest, non-null string in the set (which was found first).
* If two strings in the set are of the same length, then the first one
* found is the one returned.
* If null or a zero-length array is passed in, then null is returned.
* If a slot in the array is null, then it is ignored (not counted).
* If every slot in the array is null, then null is returned.
*/
public static String getFirstLongest(String[] set) {
/**
* Sorts the specified array by string length in ascending order.
* Shorter strings come before longer strings.
* Use your own code for bubble sort.
* If null or a zero-length array is passed in, then nothing is done.
* If a slot in the array is null, then it is considered to be longer
* than any actual string (null's sort to be at the end).
*/
for ( int maxIdx = set.length - 1; maxIdx > 0; maxIdx-- ) {
boolean swappedSomething = false;
for ( int i = 0; i < maxIdx; i++ ) {
if ( set[i] > set[i + 1] ) {
String tmp = set[i];
set[i] = set[i + 1];
set[i + 1] = tmp;
swappedSomething = true;
}
}
if ( swappedSomething == false ) {
break;
}
}
}
public static void sortLength(String[] list) {
}
// this method is complete, do not alter it
private static String format(String[] set) {
if ( set == null ) {
return "String[] is null";
}
StringBuilder sb = new StringBuilder();
for ( int i = 0; i < set.length; i++ ) {
if ( i > 0 ) {
sb.append(", ");
}
sb.append(quoteWrap(set[i]));
}
return sb.toString();
}
// this method is complete, do not alter it
private static String quoteWrap(String s) {
if ( s == null ) {
return "null";
} else {
return '"' + s + '"';
}
}
// this method is complete, do not alter it
private static void process(String[] set) {
System.out.println("Original String[]: " + format(set));
System.out.printf(" %3d - count%n", getCount(set));
System.out.printf(" %3d - shortest length (%s)%n",
getShortestLength(set), quoteWrap(getFirstShortest(set)));
System.out.printf(" %3d - longest length (%s)%n",
getLongestLength(set), quoteWrap(getFirstLongest(set)));
System.out.printf(" %5.1f - average length%n", getAverageLength(set));
System.out.printf(" %3d - total length%n", getTotalLength(set));
sortLength(set);
System.out.println("after length sort: " + format(set));
System.out.println("----------");
}
// this method is complete, do not alter it
public static void main(String[] args) {
process(new String[] { "apple" });
process(new String[] { "watermelon", "grape" });
process(new String[] { "pear", "date" });
process(new String[] { "cherry", "apple", "pear", "grape", "banana" });
// Zero-length strings are OK, they just have a length of zero
process(new String[] { "" });
process(new String[] { "", "apple", "", "cherry", "banana" });
// A zero-length array
process(new String[0]);
// No array at all, just null passed in
process(null);
// Some slots contain null instead of a String
process(new String[] { null });
process(new String[] { null, null });
process(new String[] { null, "apple", null });
process(new String[] { null, "", null });
process(new String[] { null, "apple", null, "cherry", "banana" });
}
}I'm currently working on the bubble sort algorithm to sort the length of my string arrays listed at the bottom of the program. Eclipse is telling me that the > operator is undefined for the argument type java.lang.String. How do I go about fixing this error, as I haven't worked much with string arrays, mostly just integer arrays.
