import java.io.*; import java.util.*; public class Main { static class FR { BufferedReader br; StringTokenizer tk; FR(InputStream stream) { br = new BufferedReader(new InputStreamReader(stream), 32768); tk = null; } String next() { while (tk == null || !tk.hasMoreElements()) { try { tk = new StringTokenizer(br.readLine()); } catch (IOException e) { e.printStackTrace(); } } return tk.nextToken(); } int nextInt() { return Integer.parseInt(next()); } } static void solve(InputStream stream, PrintWriter out) { FR in = new FR(stream); } public static void main(String[] args) { OutputStream os = System.out; InputStream is = System.in; PrintWriter out = new PrintWriter(os); solve(is, out); out.close(); // 不关闭就没有输出 } }

import java.io.*; public class MainTest { public static void main(String[] args) throws FileNotFoundException { long start = System.currentTimeMillis(); String src = "/home/zxzxin/Java_Maven/Algorithm/src/main/java/in.txt"; FileInputStream in = new FileInputStream(src); OutputStream os = System.out; PrintWriter out = new PrintWriter(os); Main.solve(in, out);//调用solve out.close(); long end = System.currentTimeMillis(); System.err.println("Time elapsed: " + (end - start) * 1.0 / 1000); } }

import java.io.*; import java.util.Random; public class GenerateInTxt { static String str(int n){ return n + ""; } public static void main(String[] args) throws Exception { String src = "/home/zxzxin/Java_Maven/Algorithm/src/main/java/in.txt"; FileWriter fw = new FileWriter(src); Random rnd = new Random(); int n = rnd.nextInt(100); int m = rnd.nextInt(100); fw.append(str(n) + " " + str(m) + "\n"); for(int i = 0; i < m; i++){ int a = rnd.nextInt(n) + 1; int b = rnd.nextInt(n) + 1; fw.append(str(a) + " " + str(b) + "\n"); } fw.flush(); fw.close(); } }