我的程序使用包裹在FileWriter周围的BufferedWriter，每次运行时都会在某个地方结束。我不能为我的生活找出原因。
以下是我的代码。我已经考虑了内存泄漏，但我确定会引发异常（当然，除非我已经阻止它出现）。如果它应该抛出错误，我该如何解决？ 感谢
import java.io.*;
public class BuffProcess {
static BufferedReader brOne, brTwo;
static FileReader inOne, inTwo;
//static FileInputStream fOne, fTwo;
static FileWriter out;
static BufferedWriter bw;
static StringBuffer sbOne, sbTwo;
static String stOne, stTwo, tech;
static char cOne, cTwo;
static boolean bOne, bTwo;
static int count, intOne, intTwo, intThree, intFour, intFive, intSix, maxSet, lineCount;
static int pCount, check;
public static void p(String s) {
try {
inOne = new FileReader(s + ".ck2");
inTwo = new FileReader(s + ".ck2");
brOne = new BufferedReader(inOne);
brTwo = new BufferedReader(inTwo);
out = new FileWriter(s + "_edit.ck2");
bw = new BufferedWriter(out);
} catch (FileNotFoundException e) {
System.out.println("FileNotFoundException");
} catch (IOException e) {
System.out.println("IOException");
}
stOne = "Start";
stTwo = "Start";
tech = "Pants";
bOne = true;
bTwo = false;
count = 0;
pCount = 929;
try {
while (stOne != null) { //For entire file
lineCount++;
//print("Lines processed=" + lineCount);
stOne = brOne.readLine();
brTwo.readLine();
bw.write(stOne); bw.newLine();
// Find settlements area of file
if (stOne.contains("name=\"Vestisland\"")) { //Vestisland action (settlements section)
for (int i = 2; i > 0; i--) {
stOne = brOne.readLine();
brTwo.readLine();
bw.write(stOne); bw.newLine();
}
stOne = brOne.readLine();
brTwo.readLine();
if (stOne.contains("max_settlements=")) {//For Vestisland only
while (bOne) { //Find tech levels
stTwo = brTwo.readLine();
count++;
if (stTwo.contains("technology=")) {
for (int i = 4; i > 0; i--) {
stTwo = brTwo.readLine();
count++;
}
tech = stTwo;
bOne = false;
}
}
bOne = true;
maxSet();
bw.write(maxSetBlank + maxSet + "\n"); bw.newLine();
pCount--;
//print("Number of provinces remaining=" + pCount);
//print("Number of provinces done=" + (929 - pCount));
print("Vestisland" + ++check);
while (count !=0) {
brOne.readLine();
count--;
}
}
bw.flush();
out.flush();
while (pCount > 0) {// For provinces section
stOne = brOne.readLine();
//print(stOne);
brTwo.readLine();
bw.write(stOne); bw.newLine();
if (stOne.contains("name=")) {
names:
switch (stOne) {
case nullOne: case nullTwo: case nullThree: case nullFour: case nullFive:
print(test + "null");
pCount--;
//print("Number of provinces remaining=" + pCount);
//print("Number of provinces done=" + (929 - pCount));
print("Desert" + ++check);
break names;
default:
for (int i = 2; i > 0; i--) {
stOne = brOne.readLine();
brTwo.readLine();
bw.write(stOne); bw.newLine();
}
stOne = brOne.readLine(); print(stOne);
brTwo.readLine();
if (!stOne.contains("max_settlements")) {
while (bOne) { //Find tech levels
stTwo = brTwo.readLine();
count++;
if (stTwo.contains("technology=")) {
for (int i = 4; i > 0; i--) {
stTwo = brTwo.readLine();
count++;
}
tech = stTwo;
bOne = false;
}
} //Find tech levels
bOne = true;
maxSet();
bw.write(maxSetBlank + maxSet + "\n"); bw.newLine();
bw.write(stOne); bw.newLine();
pCount--;
//print("Number of provinces remaining=" + pCount);
//print("Number of provinces done=" + (929 - pCount));
print("Without max_settlements" + ++check);
} else {
while (bOne) { //Find tech levels
stTwo = brTwo.readLine();
//print(stTwo);
count++;
if (stTwo.contains("technology=")) {
for (int i = 4; i > 0; i--) {
stTwo = brTwo.readLine();
//print(stTwo);
count++;
}
tech = stTwo;
bOne = false;
}
}
bOne = true;
maxSet();
bw.write(maxSetBlank + maxSet + "\n"); bw.newLine();
pCount--;
//print("Number of provinces remaining=" + pCount);
//print("Number of provinces done=" + (929 - pCount));
print("With max_settlements" + ++check);
}
break names;
}
}
} //While provinces remain
try {
while (stOne != null) {
bw.write(brOne.readLine()); bw.newLine();
}
} catch (NullPointerException e) {
stOne = null;
}
}
}
} catch (IOException e) {
System.out.println("IOException");
} catch (NullPointerException e) {
} finally {
try { bw.close(); } catch (IOException e) {
System.out.println("IOException");
} finally { }
}
System.out.println("Provinces=" + pCount);
}
private static void maxSet() {
int avg;
intOne = Integer.parseInt(tech.substring(16, 17));
intTwo = Integer.parseInt(tech.substring(18, 19));
intThree = Integer.parseInt(tech.substring(22, 23));
intFour = Integer.parseInt(tech.substring(24, 25));
intFive = Integer.parseInt(tech.substring(30, 31));
intSix = Integer.parseInt(tech.substring(46, 47));
avg = Math.round((intOne+intTwo+intThree+intFour+intFive+intSix)/6);
maxSet = avg + 2;
//print(maxSet);
}
private static void print(Object o) {
System.out.println(o);
}
static int pCheck = 0;
static String test = "This line is reached";
static final String maxSetBlank = "\t\tmax_settlements=";
static final String nullOne = "\t\tname=\"Western Sahara\"\n";
static final String nullTwo = "\t\tname=\"Adrar Plateau\"\n";
static final String nullThree = "\t\tname=\"Siberia\"\n";
static final String nullFour = "\t\tname=\"Sahara Desert\"\n";
static final String nullFive = "\t\tname=\"Sharawrah\"\n";
}
答案 0 :(得分：3)
我怀疑它正在抛出你忽略的NullPointerException。
我建议删除 ALL 您的异常捕获，并让方法throws出现这些异常。如果您打算对它们做一些有用的事情，那么它只是值得捕捉异常。
顺便说一句：我怀疑你的字段都不需要是静态的，如果可以，我会制作局部变量。
答案 1 :(得分：0)
靠近底部的捕获NullPointerException不会打印任何内容。
建议......使用自动记录错误的IDE，例如Eclipse。它会让你的生活变得容易十亿倍。
答案 2 :(得分：0)
首先，在catch块中打印堆栈跟踪，例如，替换
} catch (IOException e) {
System.out.println("IOException");
}
通过
} catch (IOException e) {
e.printStackTrace();
}
避免在不重新抛出或记录异常的情况下捕获异常。您在调试过程中遇到的问题是后果。
顺便说一句，如果你不知道如何处理异常，那么就不要抓住它。例如，IOException通常不应被捕获和忽略。
此外，请勿捕捉NullpointerException，IllegalStateException，IllegalArgumentException或AssertionError等逻辑错误。这几乎总是编程错误。当你抓住它们并忽略它们时，你隐藏了问题，但你还没有解决它。