Java反射调用kotlin中的类，Object类，Companion对象

1. Java反射调用kotlin中的普通类

kotlin普通类：

package com.common;
class TestNormal {fun get():String{return "Nolmal abc"}fun showNum(v:Int){println("Nolmal showNum:" + v)}
}

通过Java反射调用：

public void testNormal() {try {Class c = Class.forName("com.common.TestNormal");Object ins = c.newInstance();System.out.println("object:" + ins);Method meth1 = c.getDeclaredMethod("get");Object r1 = meth1.invoke(ins);System.out.println("method1: " + meth1);System.out.println("r1:"+r1+", type: " + r1.getClass());Method meth2 = c.getDeclaredMethod("showNum", int.class);Object r2 = meth2.invoke(ins, 10086);System.out.println("meth2: " + meth2);System.out.println("r2: " + r2);} catch (Exception e) {e.printStackTrace();}}

2. Java反射调用kotlin中的Object类

kotlin普通类：

package com.common;
object TestRef {fun get():String{return "TestRef abc"}fun showNum(v:Int){println("TestRef showNum:" + v)}
}

通过Java反射调用：

public void testObject() {try {Class c = Class.forName("com.common.TestRef");Field insField = c.getDeclaredField("INSTANCE");Object ins = insField.get(null);System.out.println("object:" + ins);Method meth1 = c.getDeclaredMethod("get");Object r1 = meth1.invoke(ins);System.out.println("method1: " + meth1);System.out.println("r1:"+r1+", type: " + r1.getClass());Method meth2 = c.getDeclaredMethod("showNum", int.class);Object r2 = meth2.invoke(ins, 10086);System.out.println("meth2: " + meth2);System.out.println("r2: " + r2);} catch (Exception e) {e.printStackTrace();}}

3. Java反射调用kotlin中的Companion对象

kotlin普通类：

package com.common;
class TestCom {companion object {fun get():String{return "TestCom abc"}fun showNum(v:Int){println("TestCom showNum:" + v)}}
}

通过Java反射调用：

public void testCompanion() {try {Class c = Class.forName("com.common.TestCom$Companion");Object ins = Class.forName("com.common.TestCom").getField("Companion").get(null);Method meth1 = c.getDeclaredMethod("get");Object r1 = meth1.invoke(ins);System.out.println("method1: " + meth1);System.out.println("r1:"+r1+", type: " + r1.getClass());Method meth2 = c.getDeclaredMethod("showNum", int.class);Object r2 = meth2.invoke(ins, 10086);System.out.println("meth2: " + meth2);System.out.println("r2: " + r2);} catch (Exception e) {e.printStackTrace();}}