数据结构
网络
RDBMS
操作系统
Java
MS Excel
iOS
HTML
CSS
Android
Python
C 编程
C++
C#
MongoDB
MySQL
Javascript
PHP
物理学
化学
生物学
数学
英语
经济学
心理学
社会科学
时尚研究
法律研究如何在 Java 中使用 getDeclaringClass()
getDeclaringClass() 方法返回声明该对象所在类的 Class 对象。仅当 Class 对象的 Class 是另一个类的成员时才会发生这种情况。否则，此方法将返回 null。
此外，如果 Class 对象表示基元类型、数组类、void 等，则 getDeclaringClass() 方法返回 null。
演示 getDeclaringClass() 方法的程序如下 −
示例
package Test;
import java.lang.reflect.*;
public class Demo {
public static void main(String[] args) {
Method[] m = String.class.getMethods();
for(int i = 0; i < m.length; i++) {
Class decClass = m[i].getDeclaringClass();
System.out.println("
The Method name is: " + m[i].toString());
System.out.println("The Declaring class name is: " + decClass.toString());
}
}
}输出
The Method name is: public boolean java.lang.String.equals(java.lang.Object) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.toString() The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.hashCode() The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.compareTo(java.lang.Object) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.compareTo(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.indexOf(java.lang.String,int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.indexOf(int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.indexOf(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.indexOf(int,int) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(char) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(java.lang.Object) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(boolean) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(char[],int,int) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(char[]) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(double) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(float) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(long) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.valueOf(int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.length() The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.isEmpty() The Declaring class name is: class java.lang.String The Method name is: public char java.lang.String.charAt(int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.codePointAt(int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.codePointBefore(int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.codePointCount(int,int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.offsetByCodePoints(int,int) The Declaring class name is: class java.lang.String The Method name is: public void java.lang.String.getChars(int,int,char[],int) The Declaring class name is: class java.lang.String The Method name is: public byte[] java.lang.String.getBytes() The Declaring class name is: class java.lang.String The Method name is: public byte[] java.lang.String.getBytes(java.lang.String) throws java.io.UnsupportedEncodingException The Declaring class name is: class java.lang.String The Method name is: public void java.lang.String.getBytes(int,int,byte[],int) The Declaring class name is: class java.lang.String The Method name is: public byte[] java.lang.String.getBytes(java.nio.charset.Charset) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.contentEquals(java.lang.StringBuffer) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.contentEquals(java.lang.CharSequence) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.equalsIgnoreCase(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.compareToIgnoreCase(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.regionMatches(int,java.lang.String,int,int) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.regionMatches(boolean,int,java.lang.String,int,int) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.startsWith(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.startsWith(java.lang.String,int) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.endsWith(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.lastIndexOf(int,int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.lastIndexOf(java.lang.String,int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.lastIndexOf(int) The Declaring class name is: class java.lang.String The Method name is: public int java.lang.String.lastIndexOf(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.substring(int) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.substring(int,int) The Declaring class name is: class java.lang.String The Method name is: public java.lang.CharSequence java.lang.String.subSequence(int,int) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.concat(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.replace(char,char) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.replace(java.lang.CharSequence,java.lang.CharSequence) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.matches(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public boolean java.lang.String.contains(java.lang.CharSequence) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.replaceFirst(java.lang.String,java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.replaceAll(java.lang.String,java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String[] java.lang.String.split(java.lang.String,int) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String[] java.lang.String.split(java.lang.String) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.CharSequence[]) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.join(java.lang.CharSequence,java.lang.Iterable) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.toLowerCase(java.util.Locale) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.toLowerCase() The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.toUpperCase() The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.toUpperCase(java.util.Locale) The Declaring class name is: class java.lang.String The Method name is: public java.lang.String java.lang.String.trim() The Declaring class name is: class java.lang.String The Method name is: public char[] java.lang.String.toCharArray() The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.format(java.util.Locale,java.lang.String,java.lang.Object[]) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.format(java.lang.String,java.lang.Object[]) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.copyValueOf(char[],int,int) The Declaring class name is: class java.lang.String The Method name is: public static java.lang.String java.lang.String.copyValueOf(char[]) The Declaring class name is: class java.lang.String The Method name is: public native java.lang.String java.lang.String.intern() The Declaring class name is: class java.lang.String The Method name is: public final void java.lang.Object.wait(long,int) throws java.lang.InterruptedException The Declaring class name is: class java.lang.Object The Method name is: public final native void java.lang.Object.wait(long) throws java.lang.InterruptedException The Declaring class name is: class java.lang.Object The Method name is: public final void java.lang.Object.wait() throws java.lang.InterruptedException The Declaring class name is: class java.lang.Object The Method name is: public final native java.lang.Class java.lang.Object.getClass() The Declaring class name is: class java.lang.Object The Method name is: public final native void java.lang.Object.notify() The Declaring class name is: class java.lang.Object The Method name is: public final native void java.lang.Object.notifyAll() The Declaring class name is: class java.lang.Object The Method name is: public default java.util.stream.IntStream java.lang.CharSequence.codePoints() The Declaring class name is: interface java.lang.CharSequence The Method name is: public default java.util.stream.IntStream java.lang.CharSequence.chars() The Declaring class name is: interface java.lang.CharSequence
更新时间：2020 年 6 月 25 日
70 次浏览
广告