Java到C#的转换 [英] java to C# convertion
本文介绍了Java到C#的转换的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
亲爱的朋友们，我有我的在C#中的经验教训的项目，我需要在一个过于使用此代码，但问题是，它的Java，你能不能帮我把它转换?！
(是否有任何可以自动转换它的程序?? !!)
我最大的问题是转换这个
Java:ArrayList< term> ...(在C#中??)
非常感谢
_________________
2堂
1.
__
Hi,Dear all friends, i have projects for my lessons in C#,I need to use this code too in that one,but the problem is,it''s java,could you please help me to convert it ?!
(Is there any program that convert it automatically ??!!)
my biggest problem is in converting this one
Java : ArrayList <term> ...(in C# ??)
Thanks alot
_________________
2 class
1.
__
class Term {
public static final byte DontCare = 2;
public Term(byte[] varVals) {
this.varVals = varVals;
}
public int getNumVars() {
return varVals.length;
}
public String toString() {
String result = "{";
for(int i=0; i<varVals.length; i++) {
if (varVals[i] == DontCare)
result += "X";
else
result += varVals[i];
result += " ";
}
result += "}";
return result;
}
public Term combine(Term term) {
int diffVarNum = -1; // The position where they differ
for(int i=0; i<varVals.length; i++) {
if (this.varVals[i] != term.varVals[i]) {
if (diffVarNum == -1) {
diffVarNum = i;
} else {
// They''re different in at least two places
return null;
}
}
}
if (diffVarNum == -1) {
// They''re identical
return null;
}
byte[] resultVars = varVals.clone();
resultVars[diffVarNum] = DontCare;
return new Term(resultVars);
}
public int countValues(byte value) {
int result = 0;
for(int i=0; i<varVals.length; i++) {
if (varVals[i] == value) {
result++;
}
}
return result;
}
public boolean equals(Object o) {
if (o == this) {
return true;
} else if (o == null || !getClass().equals(o.getClass())) {
return false;
} else {
Term rhs = (Term)o;
return Arrays.equals(this.varVals, rhs.varVals);
}
}
public int hashCode() {
return varVals.hashCode();
}
boolean implies(Term term) {
for(int i=0; i<varVals.length; i++) {
if (this.varVals[i] != DontCare &&
this.varVals[i] != term.varVals[i]) {
return false;
}
}
return true;
}
public static Term read(Reader reader) throws IOException {
int c = ''\0'';
ArrayList<Byte> t = new ArrayList<Byte>();
while (c != ''\n'' && c != -1) {
c = reader.read();
if (c == ''0'') {
t.add((byte)0);
} else if (c == ''1'') {
t.add((byte)1);
}
}
if (t.size() > 0) {
byte[] resultBytes = new byte[t.size()];
for(int i=0; i<t.size(); i++) {
resultBytes[i] = (byte)t.get(i);
}
return new Term(resultBytes);
} else {
return null;
}
}
private byte[] varVals;
}
2.
____
2.
____
class Formula {
public Formula(List<Term> termList) {
this.termList = termList;
}
public String toString() {
String result = "";
result += termList.size() + " terms, " + termList.get(0).getNumVars() + " variables\n";
for(int i=0; i<termList.size(); i++) {
result += termList.get(i) + "\n";
}
return result;
}
@SuppressWarnings("unchecked")
public void reduceToPrimeImplicants() {
originalTermList = new ArrayList<Term>(termList);
int numVars = termList.get(0).getNumVars();
ArrayList<Term>[][] table = new ArrayList[numVars + 1][numVars + 1];
for(int dontKnows=0; dontKnows <= numVars; dontKnows++) {
for(int ones=0; ones <= numVars; ones++) {
table[dontKnows][ones] = new ArrayList<Term>();
}
}
for(int i=0; i<termList.size(); i++) {
int dontCares = termList.get(i).countValues(Term.DontCare);
int ones = termList.get(i).countValues((byte)1);
table[dontCares][ones].add(termList.get(i));
}
for(int dontKnows=0; dontKnows <= numVars - 1; dontKnows++) {
for(int ones=0; ones <= numVars - 1; ones++) {
ArrayList<Term> left = table[dontKnows][ones];
ArrayList<Term> right = table[dontKnows][ones + 1];
ArrayList<Term> out = table[dontKnows+1][ones];
for(int leftIdx = 0; leftIdx < left.size(); leftIdx++) {
for(int rightIdx = 0; rightIdx < right.size(); rightIdx++) {
Term combined = left.get(leftIdx).combine(right.get(rightIdx));
if (combined != null) {
if (!out.contains(combined)) {
out.add(combined);
}
termList.remove(left.get(leftIdx));
termList.remove(right.get(rightIdx));
if (!termList.contains(combined)) {
termList.add(combined);
}
}
}
}
}
}
}
public void reducePrimeImplicantsToSubset() {
int numPrimeImplicants = termList.size();
int numOriginalTerms = originalTermList.size();
boolean[][] table = new boolean[numPrimeImplicants][numOriginalTerms];
for (int impl=0; impl < numPrimeImplicants; impl++) {
for (int term=0; term < numOriginalTerms; term++) {
table[impl][term] = termList.get(impl).implies(originalTermList.get(term));
}
}
ArrayList<Term> newTermList = new ArrayList<Term>();
boolean done = false;
int impl;
while (!done) {
impl = extractEssentialImplicant(table);
if (impl != -1) {
newTermList.add(termList.get(impl));
} else {
impl = extractLargestImplicant(table);
if (impl != -1) {
newTermList.add(termList.get(impl));
} else {
done = true;
}
}
}
termList = newTermList;
originalTermList = null;
}
public static Formula read(Reader reader) throws IOException {
ArrayList<Term> terms = new ArrayList<Term>();
Term term;
while ((term = Term.read(reader)) != null) {
terms.add(term);
}
return new Formula(terms);
}
private int extractEssentialImplicant(boolean[][] table) {
for (int term=0; term < table[0].length; term++) {
int lastImplFound = -1;
for (int impl=0; impl < table.length; impl++) {
if (table[impl][term]) {
if (lastImplFound == -1) {
lastImplFound = impl;
} else {
// This term has multiple implications
lastImplFound = -1;
break;
}
}
}
if (lastImplFound != -1) {
extractImplicant(table, lastImplFound);
return lastImplFound;
}
}
return -1;
}
private void extractImplicant(boolean[][] table, int impl) {
for (int term=0; term < table[0].length; term++) {
if (table[impl][term]) {
for (int impl2=0; impl2 < table.length; impl2++) {
table[impl2][term] = false;
}
}
}
}
private int extractLargestImplicant(boolean[][] table) {
int maxNumTerms = 0;
int maxNumTermsImpl = -1;
for (int impl=0; impl < table.length; impl++) {
int numTerms = 0;
for (int term=0; term < table[0].length; term++) {
if (table[impl][term]) {
numTerms++;
}
}
if (numTerms > maxNumTerms) {
maxNumTerms = numTerms;
maxNumTermsImpl = impl;
}
}
if (maxNumTermsImpl != -1) {
extractImplicant(table, maxNumTermsImpl);
return maxNumTermsImpl;
}
return -1;
}
private List<Term> termList;
private List<Term> originalTermList;
public static void main(String[] args) throws IOException {
Formula f = Formula.read(new BufferedReader(new FileReader(args[0])));
f.reduceToPrimeImplicants();
System.out.println(f);
f.reducePrimeImplicantsToSubset();
System.out.println(f);
}
}
推荐答案
您是否尝试过?
http://www.developer.com/xml/article.php/977781/微软推出-Java到C-Converter.htm [
Have you tried this?
http://www.developer.com/xml/article.php/977781/Microsoft-Launches-Java-to-C-Converter.htm[^]
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