类加载器、JVM部分内存管理

chenxinxiner · chenxinxiner · commit ceee0545a93c · 2020-03-26T13:35:05.000+08:00
diff --git a/src/main/java/JVM/JavaStackTest.java b/src/main/java/JVM/JavaStackTest.java
@@ -0,0 +1,24 @@
+package JVM;
+
+/**
+ * java栈 -Xss 设置最大栈值
+ *
+ * @author ：chenxin
+ * @date ：Created in 2020/3/26 12:51
+ * @description：java栈 -Xss 设置最大栈值
+ * @modified By：
+ * @version: $
+ */
+public class JavaStackTest {
+    int count = 0;
+
+    public static void main(String[] args) {
+        new JavaStackTest().f();
+    }
+
+    void f() {
+        count++;
+        System.out.println(count);
+        f();
+    }
+}
diff --git a/src/main/java/JVM/JavaStackTest2.java b/src/main/java/JVM/JavaStackTest2.java
@@ -0,0 +1,26 @@
+package JVM;
+
+/**
+ * java栈 -Xss 设置最大栈值
+ * 添加方法中的参数，查看递归次数
+ *
+ * @author ：chenxin
+ * @date ：Created in 2020/3/26 12:51
+ * @description：java栈 -Xss 设置最大栈值
+ * @modified By：
+ * @version: $
+ */
+public class JavaStackTest2 {
+    int count = 0;
+
+    public static void main(String[] args) {
+        new JavaStackTest2().f();
+    }
+
+    void f() {
+        long a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11;
+        count++;
+        System.out.println(count);
+        f();
+    }
+}
diff --git a/src/main/java/JVM/TestEditHeapSize.java b/src/main/java/JVM/TestEditHeapSize.java
@@ -0,0 +1,24 @@
+package JVM;
+
+import java.util.ArrayList;
+
+/**
+ * 测试运行时修改堆大小
+ * -Xms 初始堆值
+ * -Xmx 最大堆值
+ *
+ * @author ：chenxin
+ * @date ：Created in 2020/3/26 11:55
+ * @description：测试运行时修改堆大小
+ * @modified By：
+ * @version: $
+ */
+public class TestEditHeapSize {
+    public static void main(String[] args) {
+        ArrayList<TestEditHeapSize> testEditHeapSizes = new ArrayList<>();
+        while (true) {
+            testEditHeapSizes.add(new TestEditHeapSize());
+            System.out.println(testEditHeapSizes.size());
+        }
+    }
+}
diff --git a/src/main/java/classLoader/ClassLoaderTree.java b/src/main/java/classLoader/ClassLoaderTree.java
@@ -0,0 +1,24 @@
+package classLoader;
+
+/**
+ * 类加载器树
+ *
+ * @author ：chenxin
+ * @date ：Created in 2020/3/25 15:20
+ * @description：类加载器树
+ * @modified By：
+ * @version: $
+ */
+public class ClassLoaderTree {
+    public static void main(String[] args) {
+        ClassLoader classLoader = ClassLoaderTree.class.getClassLoader();
+        while (classLoader != null) {
+            System.out.println(classLoader.getClass().getName());
+            classLoader = classLoader.getParent();
+        }
+
+        if (classLoader == null) {
+            System.out.println("BootstrapLoader is implemented by C");
+        }
+    }
+}
diff --git a/src/main/java/classLoader/Worke.java b/src/main/java/classLoader/Worke.java
@@ -0,0 +1,23 @@
+package classLoader;
+
+/**
+ * 测试使用-Xbootclasspath:/a 参数修改类的加载级别
+ *
+ * @author ：chenxin
+ * @date ：Created in 2020/3/25 15:40
+ * @description：测试使用-Xbootclasspath:/a 参数修改类的加载级别
+ * @modified By：
+ * @version: $
+ */
+public class Worke {
+
+    public void say() {
+        System.out.println("load by AppClassLoader");
+        final ClassLoader classLoader = ClassLoaderTree.class.getClassLoader();
+        if (classLoader == null) {
+            System.out.println("load by BootstrapClassLoader readly");
+        } else {
+            System.out.println(classLoader.getClass().getName());
+        }
+    }
+}
diff --git a/src/main/java/classLoader/WorkeTest.java b/src/main/java/classLoader/WorkeTest.java
@@ -0,0 +1,18 @@
+package classLoader;
+
+import java.util.Arrays;
+
+/**
+ * @author ：chenxin
+ * @date ：Created in 2020/3/25 15:50
+ * @description：
+ * @modified By：
+ * @version: $
+ */
+public class WorkeTest {
+
+    public static void main(String[] args) {
+        System.out.println(Arrays.toString(args));
+        new Worke().say();
+    }
+}
diff --git a/src/main/java/typeInfo/compilerAPI/JavaCompilerTask.java b/src/main/java/typeInfo/compilerAPI/JavaCompilerTask.java
@@ -29,7 +29,7 @@ public static void compileJavaFromString() {
         s.append("}\n");
         s.append("}");
 
-        final Class<?> compile = comppile(className, s.toString());
+        final Class<?> compile = compile(className, s.toString());
         try {
             Object o = compile.newInstance();
             Method main = compile.getMethod("main", String[].class);
@@ -39,7 +39,7 @@ public static void compileJavaFromString() {
         }
     }
 
-    private static Class<?> comppile(String className, String javaCodes) {
+    private static Class<?> compile(String className, String javaCodes) {
         JavaSourceFromString srcObject = new JavaSourceFromString(className, javaCodes);
         System.out.println(srcObject.getCode());
         List<JavaSourceFromString> javaSourceFromStrings = Arrays.asList(srcObject);
