74 lines
1.5 KiB
Java
74 lines
1.5 KiB
Java
import java.util.Random;
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/**
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* @author: Thiago de Campos Ribeiro Nolasco
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*/
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class Aleatoria{
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/**
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* receives a String and changes certain char (seek) to other (change)
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* @param String
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* @param char
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* @param char
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* @return
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*/
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public static String changeChar(String s, char seek, char change){
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// Data declaration
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String result = "";
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for(int i = 0; i < s.length(); i++){
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if(s.charAt(i) == seek){
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result += change;
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}else{
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result += s.charAt(i);
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}
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}
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return result;
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}// ending method
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/**
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* receives a String and checks if it's equals to "FIM"
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* @param String
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* @return
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*/
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public static boolean isFim(String s){
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return(s.length() == 3 && s.charAt(0) == 'F' && s.charAt(1) == 'I' && s.charAt(2) == 'M');
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}// ending method
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/**
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* (Main) receives input from keyboard and starts the program
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* @param String[]
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*/
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public static void main(String[] args){
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// Data declaration
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String[] entries = new String[1000];
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int numEntries = 0;
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char letra1, letra2;
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// Randomizer
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Random gerador = new Random();
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gerador.setSeed(4);
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// Reading entries
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do{
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entries[numEntries] = MyIO.readLine();
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}while(!(isFim(entries[numEntries++])));
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numEntries--;
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for(int i = 0; i < numEntries; i++){
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// Get two "random" chars
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letra1 = (char)('a' + (Math.abs(gerador.nextInt()) % 26));
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letra2 = (char)('a' + (Math.abs(gerador.nextInt()) % 26));
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// And send them to "changeChar"
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MyIO.println(changeChar(entries[i], letra1, letra2));
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}
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}// ending main
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}// ending class Aleatoria
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