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a java lang nullpointerexception occurs when a java application or java applet has been badly coded typically the java program and consequently the programmer attempted to access the reference or handle to a java object that did not exist java lang nullpointerexception occurs when a java application or java applet has been badly coded typically the java program and consequently the programmer attempted to access the reference or handle to a java object that did not exist
It is simple, put a null check! Surround your object with if statement like. Object mayBeNullObj = getTheObjectItMayReturnNull(); if (mayBeNullObj != null) { // to avoid NullPointerException. mayBeNullObj.workOnIt(); }. If you think it is so easy and the subject is done, then you are caught wrong.ava API documentation says that NullPointerException can be thrown, when there is an attempt to use null where an object is required. That is you are trying to access a reference where there is no value.