异常打印（关于Arraylist）

“[” 表示一维数组

"[["表示二维数组

"L"表示一个对象

"java.lang.String"表示对象的类型

"@"后面表示该对象的HashCode

总结：用Arrays.toString(e.getStackTrace())

测试代码：

​
            System.out.println(e.getStackTrace());
            System.out.println("---------");
            System.out.println(e.getStackTrace().toString());
            System.out.println("---------");
            System.out.println(Arrays.toString(e.getStackTrace()));
            System.out.println("---------");
            int length=e.getStackTrace().length;
            for (StackTraceElement trace:e.getStackTrace()) {
                System.out.println(trace.toString());
            }
            System.out.println("---------");
            System.out.println(e.toString());
            System.out.println("---------");
            System.out.println(e.getMessage());

---

打印结果：

1.

[Ljava.lang.StackTraceElement;@5c76fce4

2.

[Ljava.lang.StackTraceElement;@5aab5b31

3.（一行老长）

[com.vop.ExceptionTest.exceptionAndGetBooleanTest(ExceptionTest.java:25), java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method), java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77), java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43), java.base/java.lang.reflect.Method.invoke(Method.java:568), org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59), org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12), org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56), org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17), org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:76), org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84), org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75), org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86), org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84), org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366), org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252), org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97), org.junit.runners.ParentRunner$4.run(ParentRunner.java:331), org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79), org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329), org.junit.runners.ParentRunner.access$100(ParentRunner.java:66), org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293), org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61), org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70), org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306), org.junit.runners.ParentRunner.run(ParentRunner.java:413), org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191), org.junit.runner.JUnitCore.run(JUnitCore.java:137), com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69), com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38), com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11), com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35), com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235), com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)]

4.(多行老长)

com.vop.ExceptionTest.exceptionAndGetBooleanTest(ExceptionTest.java:25) java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.base/java.lang.reflect.Method.invoke(Method.java:568) org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59) org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56) org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:76) org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84) org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366) org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252) org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) org.junit.runners.ParentRunner.run(ParentRunner.java:413) org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) org.junit.runner.JUnitCore.run(JUnitCore.java:137) com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38) com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11) com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35) com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)

com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)

5.

java.lang.ArithmeticException: / by zero

6.

/ by zero