java web week_one

1.在控制台打印出九九乘法表

public class Jiujiu {public static void main(String[] args) {for (int i = 1; i < 10; i++) {for (int j = 1; j <= i; j++) {System.out.print(i + " x " + j + " = " + i * j + "\t");if (i == j) {System.out.println();}}}}}

2.写一个函数用于求出整数数组中的最大值

public class MaxNumber {public static void main(String[] args) {Random random = new Random();    int[] array = new int[10];    for (int i = 0; i < 10; i++) {        int num = random.nextInt(10) + 1;//[1,10)之前的数        array[i] = num;    }    int i;    for (i = 0; i < array.length; i++) {        System.out.print(array[i] + " ");    }    if (i == array.length){        System.out.println();    }    System.out.println(forMax(array));}private static int forMax(int[] array) {    int max = array[0];    for (int i = 0; i < array.length; i++) {        if (max <= array[i]){            max = array[i];        }    }    return max;}}

4.音乐文件读取工具

public class Music {public static void main(String[] args) {File file = new File("musics");findMP3(file, file.getAbsolutePath());}private static void findMP3(File songFile, String songPath) {    File[] songList = songFile.listFiles();    if (songList != null) {        for (File s : songList) {            if (s.isDirectory()) {                findMP3(s, s.getAbsolutePath());            } else {                if (s.getAbsolutePath().endsWith(".mp3")                        || s.getAbsolutePath().endsWith("MP3")) {                    System.out.println(s.getAbsolutePath());                }            }        }    }}}