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Why do we use static keywords in Java?

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You need to understand the static vs normal ... When you defined a variable static then that variable will be shared across all the objects of the class... but the normal variable is associated with the object and it's different for different objects....Rest u can see here . https://www.javatpoint.co...
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You need to understand the static vs normal ... When you defined a variable static then that variable will be shared across all the objects of the class... but the normal variable is associated with the object and it's different for different objects....Rest u can see here . https://www.javatpoint.com/static-keyword-in-java read less
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Lets take a example you wanted to create a record of 100 student. class student { int roll_no; String name; String college_name; } so while creating 100 object of student class the student's college name will be common but in upper define class the college_name will also will be created...
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Lets take a example you wanted to create a record of 100 student. class student { int roll_no; String name; String college_name; } so while creating 100 object of student class the student's college name will be common but in upper define class the college_name will also will be created 100 times which is unnecessary and memory wastage. By declaring the college_name as static (static String college_name) only one copy of college_name will be created because only one copy of each static variable being created at class level. read less
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The static keyword in Java means that the variable or function is shared between all instances of that class as it belongs to the type, not the actual objects themselves
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