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2010-06-01T05:03:05Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Change the characters ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] argv) throws Exception {
CharacterIterator it = new StringCharacterIterator("abcd");
((StringCharacterIterator) it).setText("efgh");
char ch = it.current();
}
}</source>



== Create an iterator on a substring (efgh) ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] argv) throws Exception {
CharacterIterator it = new StringCharacterIterator("abcd");
int begin = 5;
int end = 9;
int pos = 6;
it = new StringCharacterIterator("abcd efgh ijkl", begin, end, pos);
char ch = it.current();
System.out.println(ch);
ch = it.last();
System.out.println(ch);
}
}</source>



== Iterate a subset of a string ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] args) {
String text = "this is a test";
CharacterIterator it = new StringCharacterIterator(text, 4, 27, 5);
for (char ch = it.first(); ch != CharacterIterator.DONE; ch = it.next()) {
System.out.print(ch);
}
}
}</source>



== Iterate each characters of a string ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] args) {
String text = "The quick brown fox jumps over the lazy dog";
CharacterIterator it = new StringCharacterIterator(text);
int vowels = 0;
int consonants = 0;
for (char ch = it.first(); ch != CharacterIterator.DONE; ch = it.next()) {
if (ch == "a" || ch == "e" || ch == "i" || ch == "o" || ch == "u") {
vowels = vowels + 1;
} else if (ch != " ") {
consonants = consonants + 1;
}
}
System.out.println("Number of vowels: " + vowels);
System.out.println("Number of consonants: " + consonants);
}
}</source>



== Iterate over the characters in the backward direction ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] argv) throws Exception {
CharacterIterator it = new StringCharacterIterator("abcd");
for (char ch = it.last(); ch != CharacterIterator.DONE; ch = it.previous()) {
System.out.println(ch);
}
}
}</source>



== Iterating the Characters of a String ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] argv) throws Exception {
CharacterIterator it = new StringCharacterIterator("abcd");
// Iterate over the characters in the forward direction
for (char ch = it.first(); ch != CharacterIterator.DONE; ch = it.next()) {
System.out.println(ch);
}
}
}</source>



== Reverse a string using CharacterIterator ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
private static final String text = "this is a test";
public static void main(String[] args) {
CharacterIterator it = new StringCharacterIterator(text);
for (char ch = it.last(); ch != CharacterIterator.DONE; ch = it.previous()) {
System.out.print(ch);
}
}
}</source>



== Use CharacterIterator to loop through a string ==



<source lang="java">
import java.text.CharacterIterator;
import java.text.StringCharacterIterator;
public class Main {
public static void main(String[] argv) throws Exception {
CharacterIterator it = new StringCharacterIterator("abcd");
char ch = it.first();
ch = it.current();
ch = it.next();
ch = it.current();
ch = it.last();
int pos = it.getIndex();
ch = it.next();
pos = it.getIndex();
ch = it.previous();
ch = it.setIndex(1);
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010