public class Test {
public static void main(String[] ARGSTRING) {
dummy();
System.out.println("hello");
}
public static void dummy() {
String a = (String)null;
if(a instanceof String ) {
System.out.println("String");
}
else {
System.out.println("false");
}
System.out.println(a.split(".")[0].hashCode());
}
}
=========================================================================
false
Exception in thread "main" java.lang.NullPointerException
at Test.dummy(Test.java:15)
at Test.main(Test.java:4)
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:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Process finished with exit code 1
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