Java反射调用kotlin中的类，Object类，Companion对象

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 mon; 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 mon.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 mon; 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 mon.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 mon; 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 mon.TestCom$Companion"); Object ins = Class.forName("com mon.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(); } }