异常信息:java.lang.ExceptionInInitializerError
代码
public enum KafkaSetting {
CONSUMER,
PRIVATER;
KafkaSetting() {
initProperties(this);
}
public Properties prop = new Properties();
// 这里设置一些属性
private void initProperties(KafkaSetting s) {
switch (s) {
case CONSUMER:
prop.put(ConsumerConfig.GROUP_ID_CONFIG,"G1");
break;
case PRIVATER:
prop.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.44.128:9092");
break;
default:
throw new IllegalArgumentException("Unknown type:" + this.getClass().getName());
}
}
}
测试Demo
@Test
public void kafkaSetting_test() {
KafkaSetting consumer = KafkaSetting.CONSUMER;
Properties prop = consumer.prop;
System.out.println(prop.size());
}
错误信息
java.lang.ExceptionInInitializerError
at com.xiaoxiong.utils.KafkaSetting.initProperties(KafkaSetting.java:27)
at com.xiaoxiong.utils.KafkaSetting.<init>(KafkaSetting.java:21)
at com.xiaoxiong.utils.KafkaSetting.<clinit>(KafkaSetting.java:17)
at com.xiaoxiong.utils.KafkaSettingTest.kafkaSetting_test(KafkaSettingTest.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: java.lang.NullPointerException
at com.xiaoxiong.utils.KafkaSetting.values(KafkaSetting.java:15)
at com.xiaoxiong.utils.KafkaSetting$1.<clinit>(KafkaSetting.java:27)
... 29 more