?? handleerror.c
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#include <stdio.h>#include <string.h>#include <stdlib.h>#include "MyTest.h"jint Java_MyTest_handleError(JNIEnv *env, jobject obj, jint ival) { jint ret, testInt; jclass myClass, cls; jfieldID fld, fld2, fld3; jdouble retDbl; jfloat retFlt; jmethodID mid; jstring msg; jobject eobj; ret = 0; myClass = (*env)->GetObjectClass(env, obj); if (myClass == 0) return 1; // get fieldID fld = (*env)->GetFieldID(env, myClass, "myInt","I"); if ((*env)->ExceptionOccurred(env)) { printf("Caught exception.\n"); return 2; } // get field value ret = (*env)->GetIntField(env, obj, fld); if ((*env)->ExceptionOccurred(env)) return 3; printf("Current value of myInt: %d\n", ret); ret = ival; //check that new value is within limits if (ival <0 || ival > 99) { cls = (*env)->FindClass(env, "java/lang/IllegalArgumentException"); if (cls == 0) return; mid = (*env)->GetMethodID(env, cls, "<init>", "(Ljava/lang/String;)V"); if ((*env)->ExceptionOccurred(env)) return; printf("Construct new string msg \n"); msg = (*env)->NewStringUTF(env, "Special error"); if ((*env)->ExceptionOccurred(env)) return; printf("Construct new object.\n"); eobj = (*env)->NewObject(env, cls, mid, msg); if ((*env)->ExceptionOccurred(env)) return; (*env)->Throw(env, eobj); } (*env)->SetIntField(env, obj, fld, ret); if ((*env)->ExceptionOccurred(env)) return 4; printf("New value of myInt: %d\n", ret); return(0);}?? 快捷鍵說明
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