Java 找到所有子项的方法

欢马劈雪

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查找给定类或接口的所有子类和已实现接口的方法。

实例源码：

源代码：

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//package com.nowjava;//N  o w  J a v a . c o m 提 供

import java.util.ArrayList;

import java.util.Collection;

import java.util.List;

public class Main {

public static void main(String[] argv) throws Exception {

Class cls = String.class;

Class endBefore = String.class;

System.out.println(findSuperTypes(cls, endBefore));

}

/**

* Method that will find all sub-classes and implemented interfaces

* of a given class or interface. Classes are listed in order of

* precedence, starting with the immediate super-class, followed by

* interfaces class directly declares to implemented, and then recursively

* followed by parent of super-class and so forth.

* Note that <code>Object.class</code> is not included in the list

* regardless of whether <code>endBefore</code> argument is defined or not.

* @param endBefore Super-type to NOT include in results, if any; when

*    encountered, will be ignored (and no super types are checked).

public static List<Class<?>> findSuperTypes(Class<?> cls,

Class<?> endBefore) {

return findSuperTypes(cls, endBefore, new ArrayList<Class<?>>());

}
//from 时   代    Java - nowjava.com

public static List<Class<?>> findSuperTypes(Class<?> cls,

Class<?> endBefore, List<Class<?>> result) {

_addSuperTypes(cls, endBefore, result, false);

return result;

}

private static void _addSuperTypes(Class<?> cls, Class<?> endBefore,

Collection<Class<?>> result, boolean addClassItself) {

if (cls == endBefore || cls == null || cls == Object.class) {

return;

}

if (addClassItself) {
/**代码未完, 请加载全部代码(NowJava.com).**/

​x
 
​
​
//package com.nowjava;//N  o w  J a v a . c o m 提 供
​
​
import java.util.ArrayList;
​
import java.util.Collection;
​
import java.util.List;
​
​
public class Main {
​
    public static void main(String[] argv) throws Exception {
​
        Class cls = String.class;
​
        Class endBefore = String.class;
​
        System.out.println(findSuperTypes(cls, endBefore));
​
    }
​
​
    /**
​
     * Method that will find all sub-classes and implemented interfaces
​
     * of a given class or interface. Classes are listed in order of
​
     * precedence, starting with the immediate super-class, followed by
​
     * interfaces class directly declares to implemented, and then recursively
​
     * followed by parent of super-class and so forth.
​
     * Note that <code>Object.class</code> is not included in the list
​
     * regardless of whether <code>endBefore</code> argument is defined or not.
​
     *
​
     * @param endBefore Super-type to NOT include in results, if any; when
​
     *    encountered, will be ignored (and no super types are checked).
​
     */
​
    public static List<Class<?>> findSuperTypes(Class<?> cls,
​
            Class<?> endBefore) {
​
        return findSuperTypes(cls, endBefore, new ArrayList<Class<?>>());
​
    }
//from 时   代    Java - nowjava.com
​
    public static List<Class<?>> findSuperTypes(Class<?> cls,
​
            Class<?> endBefore, List<Class<?>> result) {
​
        _addSuperTypes(cls, endBefore, result, false);
​
        return result;
​
    }
​
​
    private static void _addSuperTypes(Class<?> cls, Class<?> endBefore,
​
            Collection<Class<?>> result, boolean addClassItself) {
​
        if (cls == endBefore || cls == null || cls == Object.class) {
​
            return;
​
        }
​
        if (addClassItself) {
/**代码未完, 请加载全部代码(NowJava.com).**/