diff --git "a/\347\275\227\344\273\225\345\244\251/luoshitian.java" "b/\347\275\227\344\273\225\345\244\251/luoshitian.java" new file mode 100644 index 0000000000000000000000000000000000000000..936e7ce392281ebad2ce77c445bb11d002875ebd --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/luoshitian.java" @@ -0,0 +1,45 @@ +package com.md.lession2; + +import java.util.Scanner; + +public class luoshitian { + + public static void main(String[] args) { + + String Name = "罗仕天"; + int age = 20; + char sex ='男'; + long id= 2044010121; + int grade = 67; + + Scanner scanner =new Scanner(System.in); + System.out.println("请输入名字"); + Name = scanner.next(); + + System.out.println("请输入年龄"); + age= scanner.nextInt(); + + System.out.println("请输入性别"); + sex= scanner.next().charAt(0); + + System.out.println("请输入学号"); + id= scanner.nextInt(); + + System.out.println("请输入成绩"); + grade= scanner.nextInt(); + + + + + + + System.out.println("人物名字是:"+Name); + System.out.println("人物性别是:"+sex); + System.out.println("人物年龄是:"+age); + System.out.println("人物学号是:"+id); + System.out.println("人物成绩是:"+grade); + + } + } + + diff --git "a/\347\275\227\344\273\225\345\244\251/\344\270\252\344\272\272\344\277\241\346\201\257.java" "b/\347\275\227\344\273\225\345\244\251/\344\270\252\344\272\272\344\277\241\346\201\257.java" new file mode 100644 index 0000000000000000000000000000000000000000..9d27d1501c5f6e0dde9a32bb0926056f61766496 --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\344\270\252\344\272\272\344\277\241\346\201\257.java" @@ -0,0 +1,49 @@ +package com.md.lession2; + +import java.util.Scanner; + +public class 个人信息 { + /* + * 人物角色名（roleName）、生命值（health）、攻击力（damage）、防御力（defense）、武器加成（weaponScaling）、是否是热门英雄（isHot）。 +打印出来。 + */ + + public static void main(String[] args) { + String roleName = "雅典娜"; + long health = 3000; + int damage = 150; + int defense =90; + float weaponScaling = 0.3f; + boolean isHot =false; + + Scanner scanner =new Scanner(System.in); + System.out.println("请输入英雄的名字"); + roleName = scanner.next(); + + System.out.println("请输入英雄的生命值"); + health = scanner.nextLong(); + + System.out.println("请输入英雄的攻击力"); + damage = scanner.nextInt(); + + System.out.println("请输入英雄的防御力"); + defense= scanner.nextInt(); + + System.out.println("请输入英雄的武器加成"); + weaponScaling= scanner.nextFloat(); + + System.out.println("请输入英雄是否是热门英雄"); + isHot= scanner.nextBoolean(); + + + + + System.out.println("人物角色是:"+roleName); + System.out.println("人物生命值是:"+health); + System.out.println("人物攻击力是:"+damage); + System.out.println("人物防御力是:"+defense); + System.out.println("人物武器加成是:"+weaponScaling); + System.out.println("人物是否是热门英雄:"+isHot); + } + +} \ No newline at end of file diff --git "a/\347\275\227\344\273\225\345\244\251/\347\275\227/Demo01.java" "b/\347\275\227\344\273\225\345\244\251/\347\275\227/Demo01.java" new file mode 100644 index 0000000000000000000000000000000000000000..64f5695034d3b0749af4a84383833aa32d96ca94 --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\347\275\227/Demo01.java" @@ -0,0 +1,23 @@ +package lession; + +import java.util.Scanner; + +public class Demo01 { + + public static void main(String[] args) { + Scanner scanner =new Scanner(System.in); + System.out.println("请输入你的第一个值"); + int num1 =scanner.nextInt(); + System.out.println("请输入你的第二个值"); + int num2 =scanner.nextInt(); + System.out.println("你的第一个值："+num1); + System.out.println("你的第二个值"+num2); + int a = num1; + num1 = num2; + num2 = a; + System.out.println("nub1:"+num1); + System.out.println("nub2:"+num2); + + } + +} diff --git "a/\347\275\227\344\273\225\345\244\251/\347\275\227/Demo02.java" "b/\347\275\227\344\273\225\345\244\251/\347\275\227/Demo02.java" new file mode 100644 index 0000000000000000000000000000000000000000..34db06bf7d3c88a2453561d593d3f3e8adb3fdc4 --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\347\275\227/Demo02.java" @@ -0,0 +1,21 @@ +package lession; + +import java.util.Scanner; + +public class Demo02 { + + public static void main(String[] args) { + + Scanner scan =new Scanner(System.in); + System.out.println("请输入你的第一个值"); + int num01 =scan.nextInt(); + System.out.println("请输入你的第二个值"); + float num02 =scan.nextFloat(); + double num03=num02; + + double sum=num01 + num02 +num03; + System.out.println("sum:"+sum); + } + + } + diff --git "a/\347\275\227\344\273\225\345\244\251/\347\275\227/demo3.java" "b/\347\275\227\344\273\225\345\244\251/\347\275\227/demo3.java" new file mode 100644 index 0000000000000000000000000000000000000000..4e4be187108570e08bbde3dfa9d1602107d77fff --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\347\275\227/demo3.java" @@ -0,0 +1,27 @@ +package com.md.lession; + +import java.util.Scanner; + +public class demo3 { + + public static void main(String[] args) { + // 强制转换 + int num1; + byte num2; + float num3; + double num4; + + Scanner scan = new Scanner(System.in); + System.out.println("请输入一个double数据:"); + num4 = scan.nextDouble(); + num1 = (int)num4; + num2 =(byte)num4; + num3 =(float)num4; + + double sum =num1 +num2 +num3; + + System.out.println("强制类型转换后的总和是:"+sum); + + } + +} diff --git "a/\347\275\227\344\273\225\345\244\251/\347\275\227/lession3/Demo3.java" "b/\347\275\227\344\273\225\345\244\251/\347\275\227/lession3/Demo3.java" new file mode 100644 index 0000000000000000000000000000000000000000..966d1fbfa42e1e7cb64439d03b74d6cd2d6053a8 --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\347\275\227/lession3/Demo3.java" @@ -0,0 +1,26 @@ +package com.md.lession3; + +import java.util.Scanner; + +public class Demo3 { + + public static void main(String[] args) { + // TODO Auto-generated method stub + int F =42; + int C ; + + Scanner scan =new Scanner (System.in); + System.out.println("F=F-32="+(F-32)); + System.out.println("C=(5/9F)="+(5/9F)); + + + + } + + + + + + + +} diff --git "a/\347\275\227\344\273\225\345\244\251/\347\275\227/lession3/Demo4.java" "b/\347\275\227\344\273\225\345\244\251/\347\275\227/lession3/Demo4.java" new file mode 100644 index 0000000000000000000000000000000000000000..5f488b07229a7419e9ca5b07bc7dfc8c1cff1f40 --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\347\275\227/lession3/Demo4.java" @@ -0,0 +1,28 @@ +package com.md.lession3; + +import java.util.Scanner; + +public class Demo4 { + + public static void main(String[] args) { + // TODO Auto-generated method stub + int num1; + int num2; + + Scanner scan =new Scanner (System.in); + + System.out.print("请输入第一个数字:"); + num1 =scan.nextInt(); + + System.out.println("请输入第二个数字："); + num2 =scan.nextInt(); + + System.out.println("num1+num2="+(num1+num2)); + System.out.println("num1-num2="+(num1-num2)); + System.out.println("num1*num2="+(num1*num2)); + System.out.println("num1/num2="+(num1/(float)num2)); + System.out.println("num1%num2="+(num1%num2)); + + } + +} diff --git "a/\347\275\227\344\273\225\345\244\251/\347\275\227/\347\254\224\350\256\260.txt" "b/\347\275\227\344\273\225\345\244\251/\347\275\227/\347\254\224\350\256\260.txt" new file mode 100644 index 0000000000000000000000000000000000000000..97d48e83aa19841d74c51697d5fd5d7283da674e --- /dev/null +++ "b/\347\275\227\344\273\225\345\244\251/\347\275\227/\347\254\224\350\256\260.txt" @@ -0,0 +1,20 @@ +18（字节） =8bit +1kb=1024B +1MB=1024KB +1GB=1024MB +1TB=1024GB + +Java的基本数据类型 +整数类型 关键字 内存占用 取值范围 + byte 1 -128-127 + short 2 -32768-32767 + int 4 -2的31次方到2的31次方-1 + long 8 -2的63次方到2的63次方-1 + +浮点类型 float 4 + double 8 + +字符类型 char 2 0-65535 +布尔类型 Boolean 1 true . flase + + \ No newline at end of file