jvm

onlyliuxin · Apr 11, 2017 · a260cd7 · a260cd7
1 parent 8afbe08
commit a260cd7
Show file tree

Hide file tree

Showing 6 changed files with 128 additions and 27 deletions.
diff --git a/...ain/java/com/pan/jvm/ClassFileLoader.java → .../java/com/pan/jvm/ClassFileLoaderTmp.java b/...ain/java/com/pan/jvm/ClassFileLoader.java → .../java/com/pan/jvm/ClassFileLoaderTmp.java
@@ -7,7 +7,7 @@
 import java.util.ArrayList;
 import java.util.List;
 
-public class ClassFileLoader {
+public class ClassFileLoaderTmp {
 	private List<String> clzPaths = new ArrayList<String>();
 	int countForClassPath = 0;
 	int countForReadBinaryCode = 0;

diff --git a/group11/252308879/mini-jvm/src/main/java/com/pan/jvm/EmployeeV1.java b/group11/252308879/mini-jvm/src/main/java/com/pan/jvm/EmployeeV1.java
@@ -0,0 +1,31 @@
+package com.pan.jvm;
+
+public class EmployeeV1 {
+
+
+    private String name;
+    private int age;
+
+    public EmployeeV1(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public void sayHello() {
+        System.out.println("Hello , this is class Employee ");
+    }
+
+    public static void main(String[] args) {
+        EmployeeV1 p = new EmployeeV1("Andy", 29);
+        p.sayHello();
+
+    }
+}
diff --git a/group11/252308879/mini-jvm/src/main/java/com/pan/jvm/loader/ClassFileLoader.java b/group11/252308879/mini-jvm/src/main/java/com/pan/jvm/loader/ClassFileLoader.java
@@ -18,31 +18,21 @@ public class ClassFileLoader {
     private List<String> clzPaths = new ArrayList();
 
     public byte[] readBinaryCode(String className) {
-
         className = className.replace('.', File.separatorChar) + ".class";
-
         for (String path : this.clzPaths) {
-
             String clzFileName = path + File.separatorChar + className;
             byte[] codes = loadClassFile(clzFileName);
             if (codes != null) {
                 return codes;
             }
         }
-
         return null;
-
-
     }
 
     private byte[] loadClassFile(String clzFileName) {
-
         File f = new File(clzFileName);
-
         try {
-
             return IOUtils.toByteArray(new FileInputStream(f));
-
         } catch (IOException e) {
             e.printStackTrace();
             return null;
@@ -54,9 +44,7 @@ public void addClassPath(String path) {
         if (this.clzPaths.contains(path)) {
             return;
         }
-
         this.clzPaths.add(path);
-
     }
 
 
@@ -74,7 +62,6 @@ public ClassFile loadClass(String className) {
 
     // ------------------------------backup------------------------
     public String getClassPath_V1() {
-
         StringBuffer buffer = new StringBuffer();
         for (int i = 0; i < this.clzPaths.size(); i++) {
             buffer.append(this.clzPaths.get(i));
@@ -88,31 +75,19 @@ public String getClassPath_V1() {
     private byte[] loadClassFile_V1(String clzFileName) {
 
         BufferedInputStream bis = null;
-
         try {
-
             File f = new File(clzFileName);
-
-
             bis = new BufferedInputStream(new FileInputStream(f));
-
             ByteArrayOutputStream bos = new ByteArrayOutputStream();
-
-
             byte[] buffer = new byte[1024];
             int length = -1;
-
             while ((length = bis.read(buffer)) != -1) {
                 bos.write(buffer, 0, length);
             }
-
             byte[] codes = bos.toByteArray();
-
             return codes;
-
         } catch (IOException e) {
             e.printStackTrace();
-
         } finally {
             if (bis != null) {
                 try {
@@ -123,7 +98,6 @@ private byte[] loadClassFile_V1(String clzFileName) {
             }
         }
         return null;
-
     }
 
 

diff --git a/group11/252308879/mini-jvm/src/test/java/com/pan/alg/LRUPageFrameTest.java b/group11/252308879/mini-jvm/src/test/java/com/pan/alg/LRUPageFrameTest.java
@@ -0,0 +1,34 @@
+package com.pan.alg;
+
+import  org.junit.Assert;
+
+import org.junit.Test;
+
+
+public class LRUPageFrameTest {
+
+	@Test
+	public void testAccess() {
+		LRUPageFrame frame = new LRUPageFrame(3);
+		frame.access(7);
+		frame.access(0);
+		frame.access(1);
+		Assert.assertEquals("1,0,7", frame.toString());
+		frame.access(2);
+		Assert.assertEquals("2,1,0", frame.toString());
+		frame.access(0);
+		Assert.assertEquals("0,2,1", frame.toString());
+		frame.access(0);
+		Assert.assertEquals("0,2,1", frame.toString());
+		frame.access(3);
+		Assert.assertEquals("3,0,2", frame.toString());
+		frame.access(0);
+		Assert.assertEquals("0,3,2", frame.toString());
+		frame.access(4);
+		Assert.assertEquals("4,0,3", frame.toString());
+		frame.access(5);
+		Assert.assertEquals("5,4,0", frame.toString());
+
+	}
+
+}
diff --git a/group11/252308879/mini-jvm/src/test/java/com/pan/jvm/EmployeeV1.java b/group11/252308879/mini-jvm/src/test/java/com/pan/jvm/EmployeeV1.java
@@ -0,0 +1,31 @@
+package com.pan.jvm;
+
+public class EmployeeV1 {
+
+
+    private String name;
+    private int age;
+
+    public EmployeeV1(String name, int age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public void sayHello() {
+        System.out.println("Hello , this is class Employee ");
+    }
+
+    public static void main(String[] args) {
+        EmployeeV1 p = new EmployeeV1("Andy", 29);
+        p.sayHello();
+
+    }
+}
diff --git a/group11/252308879/mini-jvm/src/test/java/com/pan/jvm/TestReadCFBB.java b/group11/252308879/mini-jvm/src/test/java/com/pan/jvm/TestReadCFBB.java
@@ -1,10 +1,41 @@
 package com.pan.jvm;
 
+import com.pan.jvm.loader.ClassFileLoader;
+import org.junit.Test;
+
+import java.io.IOException;
+
 /**
  * 用于测试第一次JVM作业，读取.class作业 和 魔幻数字
  */
 public class TestReadCFBB {
 
+    @Test
+    public void testClassPath(){
+        ClassFileLoader classFileLoader = new ClassFileLoader();
+        String path = ClassFileLoader.class.getClassLoader().getResource("").getPath();
+        path = path.replace("test-classes", "classes");
+        classFileLoader.addClassPath(path);
+        classFileLoader.addClassPath("d://tmp");
+
+        String clzPath = classFileLoader.getClassPath();
+        System.out.println(clzPath);
+    }
+
+
+
+    @Test
+    public void testReadCFBB() throws IOException {
 
+        ClassFileLoader classFileLoader = new ClassFileLoader();
+        String path = ClassFileLoader.class.getClassLoader().getResource("").getPath();
+        path = path.replace("test-classes", "classes");
+        classFileLoader.addClassPath(path);
+        byte[] bytes = classFileLoader.readBinaryCode("com.pan.jvm.loader.ClassFileLoader");
+        for (byte b : bytes) {
+            String toHexString = Integer.toHexString(b & 0xFF).toUpperCase();
+            System.out.print(toHexString + " ");
+        }
+    }
 
 }