spring学习笔记

摘要： //程序清单2-1 public class ComputeArea { //功能:实现计算圆面积 public static void main(String[] args) { double radius; //Declare radius double area; //Declare area //Assign a radius radius = 20; //Compute Area area = radius * radius * 3.14159; //Display results System.out.println... 阅读全文

摘要： import java.util.*; import java.io.*; //简单的日志功能 public class Test { public static void main(String[] args) { String s = null; BufferedReader br = new BufferedReader ( new InputStreamReader(System.in));//标准输入 try { FileWriter fw = new FileWriter("C:/java/logfile.txt",true)... 阅读全文

摘要： import java.io.*; public class Test { public static void main(String[] args) { // 字节数组(内存）----<---baos-<---====<==dos==<===程序 ByteArrayOutputStream baos = new ByteArrayOutputStream(); DataOutputStream dos = new DataOutputStream(baos); try { dos.writeDouble(Math.random()); ... 阅读全文

摘要： import java.io.*; public class Test { public static void main(String[] args) { try { OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("C:/java/char.txt")); osw.write("microsoftibssunapplehp"); System.out.println(osw.getEncoding());//文本编码 osw.close(); //加了tr... 阅读全文

摘要： import java.util.Scanner; public class MoFang { public static void main(String[] args) { System.out.println("输入行(列)数："); Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int[][] a = new int[n][n]; int i = 0; int j = n / 2; //算法精要 for (int k = 1; k <= n * n; k++) { ... 阅读全文