diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.classpath" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.classpath"
new file mode 100644
index 0000000000000000000000000000000000000000..51a8bbad89682d379e0aadb7bd54d22de601a62f
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.classpath"
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.project" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.project"
new file mode 100644
index 0000000000000000000000000000000000000000..e1e0971daa98c4b508ea66f3c8301093cf1fccc5
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.project"
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>lessen1</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.settings/org.eclipse.jdt.core.prefs" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.settings/org.eclipse.jdt.core.prefs"
new file mode 100644
index 0000000000000000000000000000000000000000..3a21537071bf4118b9e1ee864cb4bc258aa48211
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/.settings/org.eclipse.jdt.core.prefs"
@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/Lession2.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/Lession2.class"
new file mode 100644
index 0000000000000000000000000000000000000000..e9f3d308d5ade2f55a85f55725b9acc2e0e43cc8
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/Lession2.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/bianliang.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/bianliang.class"
new file mode 100644
index 0000000000000000000000000000000000000000..b400bfcb739a9c7a46543c5b5e0530eb80ac4c97
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/bianliang.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/lession4.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/lession4.class"
new file mode 100644
index 0000000000000000000000000000000000000000..24bf03f4fb9a1386156be950be5ec15adcf5621d
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/lession4.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/liuhanwen.class" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/liuhanwen.class"
new file mode 100644
index 0000000000000000000000000000000000000000..98f9db2a50bfe6f660addfb2964467bc8f37fd25
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/bin/lessen1/liuhanwen.class" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/Lession2.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/Lession2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..a6eb8ffa2f3ed5d7e4f2d64b1b0e52ea715bf386
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/Lession2.java"
@@ -0,0 +1,30 @@
+package lessen1;
+
+import java.util.Scanner;
+
+public class Lession2 {public static void main(String[] args) {
+	// TODO Auto-generated method stub
+    Scanner scanner = new Scanner(System.in);
+    
+    int a;
+    short b;
+    long c;
+    byte d;
+    long sun;
+    System.out.println("a的值为多少");
+    a = scanner.nextInt();
+    System.out.println("b的值为多少");
+    b = scanner.nextShort();
+    System.out.println("c的值为多少");
+    c = scanner.nextLong();
+    System.out.println("d的值为多少");
+    d = scanner.nextByte();
+    
+    sun = a+b+c+d;
+    System.out.println("sun="+sun);
+    
+}
+
+}
+
+
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/bianliang.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/bianliang.java"
new file mode 100644
index 0000000000000000000000000000000000000000..bf095dc61b18b652e67ac0fe265e5546d8532f25
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/bianliang.java"
@@ -0,0 +1,23 @@
+package lessen1;
+
+public class bianliang {
+	public static void main(String[] args) {
+		int num1=10;
+		int num2=15;
+		int temp;    //中间变量 
+		//显示交换前的变量的值
+		System.out.print("交换前的两个变量的值为");
+		System.out.println("num1="+num1+"\t"+"num2="+num2);
+		//实现两个变量的交换
+		temp=num1;
+		num1=num2;
+		num2=temp;
+		//显示交换后的变量的值
+		System.out.print("交换后的两个变量的值为");
+		System.out.println("num1="+num1+"\t"+"num2="+num2);
+		
+
+		
+	}
+
+}
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/lession4.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/lession4.java"
new file mode 100644
index 0000000000000000000000000000000000000000..bf564e4331f988cd20d88345b355635bd9ab9f82
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/lession4.java"
@@ -0,0 +1,23 @@
+package lessen1;
+
+import java.util.Scanner;
+
+public class lession4 {
+	public static void main(String[] args) {
+		int num1;
+		byte num2;
+		float num3;
+		double num4;
+		Scanner san = new Scanner(System.in);
+		System.out.println("入double");
+		num4 = san.nextDouble();
+		num1=(int)num4;
+		num2=(byte)num4;
+		num3=(float)num4;
+		double sum= num1+num2+num3;
+		System.out.println("强制"+sum);
+		
+		
+	}
+
+}
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/liuhanwen.java" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/liuhanwen.java"
new file mode 100644
index 0000000000000000000000000000000000000000..92fdf87bb5c3cab8b013595981144835acbe3310
--- /dev/null
+++ "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/lessen1/src/lessen1/liuhanwen.java"
@@ -0,0 +1,34 @@
+package lessen1;
+
+import java.util.Scanner;
+
+
+public class liuhanwen {
+	public static void main(String[] args){
+		
+	String name;
+	    int age;
+	         
+			
+			
+			
+		
+		
+		Scanner scanner = new Scanner(System.in);
+		
+		System.out.println("请输入你的名字");
+		
+		name = scanner.next();
+		
+		System.out.println("你的名字是："+name);
+		
+		System.out.println("请输入你的年龄");
+		
+		age =scanner.nextInt();
+		
+		System.out.println("你的年龄是："+age);
+		
+	}
+	
+	
+}
\ No newline at end of file
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/Java \345\237\272\346\234\254\346\225\260\346\215\256\347\261\273\345\236\213.docx" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/Java \345\237\272\346\234\254\346\225\260\346\215\256\347\261\273\345\236\213.docx"
new file mode 100644
index 0000000000000000000000000000000000000000..8b0f472caeba4c3ca01f15016bd4adaa5e0220e1
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/Java \345\237\272\346\234\254\346\225\260\346\215\256\347\261\273\345\236\213.docx" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/\346\225\260\346\215\256\347\261\273\345\236\213\346\200\273\347\273\2231.PNG" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/\346\225\260\346\215\256\347\261\273\345\236\213\346\200\273\347\273\2231.PNG"
new file mode 100644
index 0000000000000000000000000000000000000000..60b857891bc6f27fcd211451c81b7f8935102820
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/\346\225\260\346\215\256\347\261\273\345\236\213\346\200\273\347\273\2231.PNG" differ
diff --git "a/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/\346\225\260\346\215\256\347\261\273\345\236\213\346\200\273\347\273\2232.PNG" "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/\346\225\260\346\215\256\347\261\273\345\236\213\346\200\273\347\273\2232.PNG"
new file mode 100644
index 0000000000000000000000000000000000000000..c233ee6f92be493c2bc057e7e1c9523673012ae7
Binary files /dev/null and "b/Java\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\210\230\346\261\211\346\226\207/liuhanwen/\346\225\260\346\215\256\347\261\273\345\236\213\346\200\273\347\273\2232.PNG" differ