java - Casting from JTable Object to int -



java - Casting from JTable Object to int -

i attempting retrieve value jtable , getting java.lang.nullpointer exception. next line seems issue. trying take object, 25, , cast int. reason simple task seems extremely hard or impossible. looked @ stackoverflow users question similar problem never got response worked.

the error codes read follows: exception in thread "awt-eventqueue-0" java.lang.nullpointerexception @ gradebook$5.actionperformed(gradebook.java:925)this sec line in loop.

note: edited post provide additional code.

for(int = 0; < 10; i++){ myclass[currentclass].getcategoryelement(i).setname((string)categoriestable.getmodel().getvalueat(i, 1)); myclass[currentclass].getcategoryelement(i).setweight(integer.valueof((string)(categoriestable.getmodel().getvalueat(i, 2))));//this line identified problem } categoriestable.setmodel(new defaulttablemodel( new object[][] { {"1", "classwork", "20"}, {"2", "homework", "20"}, {"3", "tests", "20"}, {"4", "quizzes", "20"}, {"5", "projects", "20"}, {"6", null, null}, {"7", null, null}, {"8", null, null}, {"9", null, null}, {"10", null, null}, },

thank helping me. used if statement check null values though i'm still not sure why didn't need same thing first statement in loop.

java swing casting jtable int

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