类的构造过程实例

最新推荐文章于 2021-02-16 16:01:36 发布

转载最新推荐文章于 2021-02-16 16:01:36 发布 · 1k 阅读

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#constructor #class #汇编 #string #java #c

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博客给出了Java代码示例，定义了父类Parent、子类Child和类Other，展示了类的初始化过程，包括实例初始化块、静态初始化块和构造函数。还提到通过javap命令对Child类进行反汇编，体现了Java类的构建与反汇编操作。

//InitializationTest.java

package foldConstructor;
// //父类的定义
class Parent {
int pm1;

int pm2 = 10;

int pm3 = pmethod();
{
System.out.println("Parent's instance initialize block");
}

public static int spm1 = 10;
static {
System.out.println("Parent's static initialize block");
}

Parent() {
System.out.println("Parent's default constructor");
}

static void staticmethod() {
System.out.println("Parent's staticmethod");
}

int pmethod() {
System.out.println("Parent's method");
return 3;
}
}

class Child extends Parent {
int cm1;

int cm2 = 10;

int cm3 = cmethod();

Other co;

public static int scm1 = 10;
{
System.out.println("Child's instance initialize block");
}
static {
System.out.println("Child's static initialize block");
}

Child() {
co = new Other();
System.out.println("Child's default constructor");
}

Child(int m) {
  this();
  cm1 = m;
  System.out.println("Child's self-define constructor");
}

static void staticmethod() {
System.out.println("Child's staticmethod");
}

int cmethod() {
System.out.println("Child's method");
return 3;
}

}

class Other {
int om1;

Other() {
System.out.println("Other's default constructor");
}

}

public class InitializationTest {
public static void main(String args[]) {
  Child c;
  System.out.println("program start");
//  System.out.println(Child.scm1);
//  Child.staticmethod();
  c = new Child(10);
  Child.staticmethod();
  System.out.println("program end");
}
}

//通过java的javap来反汇编：

// javap -c -classpath . Child