diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo10.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo10.java" new file mode 100644 index 0000000000000000000000000000000000000000..cd38552b457c29a0d52ed37945aa25f491618c3a --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo10.java" @@ -0,0 +1,26 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Demo10 { + + public static void main(String[] args) { + + Scanner scanner = new Scanner(System.in); + System.out.println("请输入1998 - 2008 之间的任意年份："); + int a = scanner.nextInt(); + + + if (a>=1998 && a<=2008 && a % 4 == 0) { + System.out.println("该年为闰年。"); + + } else { + System.out.println("该年为平年。"); + + } + + } + + } + + diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo11.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo11.java" new file mode 100644 index 0000000000000000000000000000000000000000..ae6b8563c4454a5dd6de099f2a898c0c62cc1795 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo11.java" @@ -0,0 +1,37 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Demo11 { + + public static void main(String[] args) { + int num; + boolean sushu = true; + + Scanner scanner = new Scanner (System.in); + System.out.println("请输入一个数字："); + num = scanner .nextInt(); + + for (int i = 2; i <= num / 2; i++) { + if (num % i == 0) + sushu= false; + } + if (sushu=true) { + System.out.println("这个数字为素数。"); + + } else { + System.out.println("这个数字不为素数。"); + + } + + + + + + + + + + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo2.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo2.java" new file mode 100644 index 0000000000000000000000000000000000000000..c61a486ba6daa3be307dd569481ea9949af86c7e --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo2.java" @@ -0,0 +1,20 @@ +package com.md.lesson1; + +public class Demo2 { + + public static void main(String[] args) { + int a = 3; + + + while(a<=9) { + a=a++; + System.out.println((a++)+"*"+"3"+"="+"?"); + + } + + + } + + } + + diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo3.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo3.java" new file mode 100644 index 0000000000000000000000000000000000000000..584bbe7d92c74f42493dc2254a62090bbf6cc9b6 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo3.java" @@ -0,0 +1,14 @@ +package com.md.lesson1; + +public class Demo3 { + + public static void main(String[] args) { + int a = 0; + while(a<=10){ + a++; + System.out.println("**********"); + + } + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo4.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo4.java" new file mode 100644 index 0000000000000000000000000000000000000000..538a86e799810bc87770a03b2e755bc5f899972e --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo4.java" @@ -0,0 +1,28 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Demo4 { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + int a = 1; + int x ; + int c = 0; + + do { + System.out.println("请输入第"+ a++ +"个成绩："); + x = scanner .nextInt(); + a=a++; + c=x+c; + + + } while (a<=5); + System.out.println("sum=" +c); + + + + + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo5.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo5.java" new file mode 100644 index 0000000000000000000000000000000000000000..6a4162566511f5001f816ba96d1ac607d5237414 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo5.java" @@ -0,0 +1,31 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Demo5 { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + int a = 1; + int sum = 0; + while (a<=5) { + System.out.println("请输入成绩："); + a++; + int score = scanner.nextInt(); + if (score>=0&&score<=100) { + sum = sum + score; + + } else { + System.out.println("改成绩有误，不列入计算！"); + a++; + + } + + + } + System.out.println("sum=" +sum); + + + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo6.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo6.java" new file mode 100644 index 0000000000000000000000000000000000000000..a5ff58f0746af634172cecbd4932a4f5bb5ffe66 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo6.java" @@ -0,0 +1,13 @@ +package com.md.lesson1; + +public class Demo6 { + + public static void main(String[] args) { + for (int i = 3; i <=9; i=i++) { + System.out.println( (i++) + "*" + "3" + "=" +"?" ); + + } + + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo7.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo7.java" new file mode 100644 index 0000000000000000000000000000000000000000..94708fea8b9976f0e8d346e8dd631ba4b4e3e727 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo7.java" @@ -0,0 +1,44 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Demo7 { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + + System.out.println("请输入任意一个星期数:"); + int i = scanner.nextInt(); + + switch (i) { + case 1: + System.out.println("工作日"); + break; + case 2: + System.out.println("工作日"); + break; + case 3: + System.out.println("工作日"); + break; + case 4: + System.out.println("工作日"); + break; + case 5: + System.out.println("工作日"); + break; + case 6: + System.out.println("休息日"); + break; + case 7: + System.out.println("休息日"); + break; + + default: + System.out.println("你输入的不是星期"); + break; + } + + + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo8.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo8.java" new file mode 100644 index 0000000000000000000000000000000000000000..d940ae1b6ec2876647f6d551b3703ab539c3fe3d --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo8.java" @@ -0,0 +1,46 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Demo8 { + + public static void main(String[] args) { + Scanner scanner = new Scanner (System.in); + + System.out.println("请输入任意一个星期数："); + int i = scanner.nextInt(); + + switch (i) { + case 1: + System.out.println("跑步！"); + break; + case 2: + System.out.println("游泳！"); + break; + case 3: + System.out.println("慢走！"); + break; + case 4: + System.out.println("动感单车！"); + break; + case 5: + System.out.println("拳击！"); + break; + case 6: + System.out.println("爬山！"); + break; + case 7: + System.out.println("好好吃一顿！"); + break; + + default: + System.out.println("你输入错误！"); + break; + } + + + + + } + +} diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo9.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo9.java" new file mode 100644 index 0000000000000000000000000000000000000000..c37b698f982deb414dd6485e0d124250888ac3e5 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Demo9.java" @@ -0,0 +1,19 @@ +package com.md.lesson1; + +public class Demo9 { + + public static void main(String[] args) { + + + System.out.println("1-100之间的偶数和为："); + System.out.println("2+4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36+38+40+42+44+46+48+50+52+54+56+58+60+62+64+66+68+70+72+74+76+78+80+82+84+86+88+90+92+94+96+98+100=9900"); + + + + } + + } + + + + diff --git "a/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Deom1.java" "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Deom1.java" new file mode 100644 index 0000000000000000000000000000000000000000..09dce648583c1b7f3e6168f928a4c7d1345365b5 --- /dev/null +++ "b/Java\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/\345\274\240\345\256\217/Deom1.java" @@ -0,0 +1,61 @@ +package com.md.lesson1; + +import java.util.Scanner; + +public class Deom1 { + + public static void main(String[] args) { + System.out.println("*********************************"); + System.out.println("*****微型计算器 ****"); + System.out.println("*****1、求和 ****"); + System.out.println("*****2、求差 ****"); + System.out.println("*****3、求积 ****"); + System.out.println("*****4、求商 ****"); + System.out.println("*****5、求余 ****"); + System.out.println("*****Q、退出 ****"); + System.out.println("*****请选择您想执行的操作 ****"); + System.out.println("*********************************"); + + Scanner scanner = new Scanner(System.in); + String choose = scanner.next(); + + System.out.println("请输入第一个数字："); + int a = scanner.nextInt(); + System.out.println("请输入第二个数字："); + int b = scanner.nextInt(); + + switch (choose) { + case "1": + System.out.println("结果是："+(a+b)); + break; + case "2": + System.out.println("结果是："+(a-b)); + break; + case "3": + System.out.println("结果是："+(a*b)); + break; + case "4": + System.out.println("结果是："+(a/b)); + break; + case "5": + System.out.println("结果是："+(a%b)); + break; + case "Q": + System.out.println("退出成功！"); + break; + + + + } + + + + + + } + + + + } + +