我没有遇到编译错误，但我的代码没有向保存的文件输出任何内容。该代码确实创建了文件，但它们是空的。有人看到我做错了什么吗？
public class CellAutomataTest {
public static void main(String[] args)
{
int rule = 120;//Integer.parseInt(args[0]);
int numGen = 5;//Integer.parseInt(args[1]);
String fileStem = "ca";//args[2];
int width = 400;//Integer.parseInt(args[3]);
int height = 400;//Integer.parseInt(args[4]);
CellAutomata test = new CellAutomata(numGen, rule);
PrintWriter writer = null;
try {
writer = new PrintWriter(new FileWriter(fileStem + ".js"));
} catch (IOException ex) {
Logger.getLogger(CellAutomataTest.class.getName()).log(Level.SEVERE, null, ex);
}
PrintWriter writer2 = null;
try {
writer2 = new PrintWriter(new FileWriter(fileStem + ".html"));
} catch (IOException ex) {
Logger.getLogger(CellAutomataTest.class.getName()).log(Level.SEVERE, null, ex);
}
writer.println("function draw() {");
writer.println("var canvas = document.getElementById('CellAutomata');");
writer.println("if (canvas && canvas.getContext) {");
writer.println("var context = canvas.getContext('2d');");
test.simulate(writer, width, height);
writer2.println("<html>");
writer2.println("<head>");
writer2.println("<script src=\"" + fileStem + ".js></script>");
writer2.println("<style type=\"text/css\">");
writer2.println("canvas { border: 1px solid black; }");
writer2.println("</style> </head>");
writer2.println("<body onload=\"draw();\">");
writer2.println("<h1>Cellular Automata with Rule " + rule + "</h1>");
writer2.println("<canvas id=\"CellAutomata\" width=\"" + width + "\" height=\"" + height + "\">");
writer2.println("<p>Your browser doesn't support canvas.</p>");
writer2.println("</canvas> </body> </html>");
}
}
最佳答案
您需要使用:
writer2.flush();
writer2.close();
实际保存文件。
关于java - 使用 PrintWriter 不输出到文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13003822/