java学习编程逻辑思维练习

public class Task_01 {

	/* 1.定义数组输入 10个数字，排序 输出 从大到小 从小到大.... */
	public static void MaxAndMin() {

		Scanner sc = new Scanner(System.in);
		int[] array = new int[10];
		for (int i = 0; i < array.length; i++) {
			System.out.println("请输入第" + (i + 1) + "个整型数字");
			array[i] = sc.nextInt();
		}

		int num;

		for (int i = 0; i < array.length; i++) {
			for (int j = i + 1; j < array.length; j++) {
				if (array[i] < array[j]) {
					num = array[i];
					array[i] = array[j];
					array[j] = num;
				}
			}

		}

		System.out.println("从大到小排序为：");
		for (int i = 0; i < array.length; i++) {
			System.out.print(array[i] + "  ");
		}

		System.out.println("\n从小到大排序为：");
		for (int i = array.length - 1; i >= 0; i--) {
			System.out.print(array[i] + "  ");
		}

	}

	/*
	 * 使用：scnner类 输入用户名密码，模拟登陆操作，机会只有三次，成功输出 恭喜你登陆成功，否则输出 用户名/密码错误，并且提示 你还有几次机会
	 */

	public static void Dl() {

		Scanner sc = new Scanner(System.in);
		String name = "ym";
		String pow = "123456";

		for (int i = 0; i < 3; i++) {
			System.out.println("请输入用户名");
			String inName = sc.next();
			System.out.println("请输入密码");
			String inPow = sc.next();

			if (inName.equals(name) && inPow.equals(pow)) {
				System.out.println("登录成功！");
				break;
			} else {
				if (i != 2)
					System.out.println("您还有" + (2 - i) + "次输入机会！");
				else
					System.out.println("输入错误已达三次，您的账户已锁定！");
			}

		}

	}

	/* 输出菱形 使用循环操作 */

	public void Lx() {

		for (int i = 0; i < 10; i++) {

			for (int k = 9; k > i; k--)
				System.out.print(" ");

			for (int j = 0; j < 2 * i + 1; j++)
				System.out.print("*");

			System.out.println();

		}

		for (int i = 0; i < 10; i++) {

			for (int k = 0; k < i; k++)
				System.out.print(" ");

			for (int j = 20; j > 2 * i + 1; j--)
				System.out.print("*");

			System.out.println();

		}

	}
	
	
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		/*静态方法调用方法*/
		 MaxAndMin();
	     Dl();
	     /*实例化对象调用方法*/
		Task_01 ts = new Task_01();
				ts.Lx();
	}