Roberto Monteiro Dias

Eu sou novo em Java e estou tentando executar o algoritmo Stable Marrage de GaleShapley, mas ao executá-lo, aparece o seguinte erro: Error: Index 3 out of bounds for length 3 Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 3 at br.com.entrada.GaleShapley.calcMatches(GaleShapley.java:48) at br.com.entrada.GaleShapley.<init>(GaleShapley.java:33) at br.com.entrada.GaleShapley1.main(GaleShapley1.java:164) Gale Shapley Marriage Algorithm Sized : 3 Segue o código abaixo: import java.io.BufferedReader; import java.io.DataInputStream; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; public class GaleShapley { private int N, engagedCount; private String[][] menPref; private String[][] womenPref; private String[] men; private String[] women; private String[] womenPartner; private boolean[] menEngaged; /** Constructor **/ public GaleShapley (){ } public GaleShapley(String[] m, String[] w, String[][] mp, String[][] wp) { System.out.println("Sized : "+ mp.length); N = mp.length; engagedCount = 0; men = m; women = w; menPref = mp; womenPref = wp; menEngaged = new boolean[N]; womenPartner = new String[N]; calcMatches(); } /** function to calculate all matches **/ private void calcMatches() { while (engagedCount < N) { int free; for (free = 0; free < N; free++) if (!menEngaged[free]) break; for (int i = 0; i < N && !menEngaged[free]; i++) { int index = womenIndexOf(menPref[free]); if (index < womenPartner.length && womenPartner[index] != null ) { womenPartner[index] = men[free]; menEngaged[free] = true; engagedCount++; } else { String currentPartner = womenPartner[index]; if (morePreference(currentPartner, men[free], index)) { womenPartner[index] = men[free]; menEngaged[free] = true; menEngaged[menIndexOf(currentPartner)] = false; } } } } printCouples(); } /** function to check if women prefers new partner over old assigned partner **/ private boolean morePreference(String curPartner, String newPartner, int index) { for (int i = 0; i < N; i++) { if (womenPref[index].equals(newPartner)) return true; if (womenPref[index].equals(curPartner)) return false; } return false; } /** get men index **/ private int menIndexOf(String str) { for (int i = 0; i < N; i++) if (men.equals(str)) return i; return -1; } /** get women index **/ private int womenIndexOf(String str) { for (int i = 0; i < N; i++) if (women.contains(str)) return i; return -1; } /** print couples **/ public void printCouples() { System.out.println("Couples are : "); for (int i = 0; i < N; i++) { System.out.println(womenPartner +" "+ women); } } /** main function **/ public static void main(String[] args) throws IOException{ System.out.println("Gale Shapley Marriage Algorithm\n"); /** list of men **/ String[] m = {"1", "2", "3"}; /** list of women **/ String[] w = {"1", "2", "3"}; /** men preference **/ String[][] mp = null ; /** women preference **/ String[][] wp= null ; try{ FileInputStream fstream = new FileInputStream("src/input.txt"); DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; int line=0; int k=0; int n=0; int i=0; while ((strLine = br.readLine()) != null) { if(line==0){ n =Integer.valueOf(strLine.trim()); mp=new String[n][n]; wp=new String[n][n]; line++; } else{ String[] preferences=strLine.split(" "); if(i<n){ mp=preferences; } else{ if(i-n < w.length) { wp[i-n]=preferences; } } i++; } } in.close(); GaleShapley gs = new GaleShapley(m, w, mp, wp); }catch (Exception e){//Catch exception if any e.printStackTrace(); System.err.println("Error: " + e.getMessage()); } } }