The interviewer asks you the difference between Final, Finally and Finalize

final

The final keyword can be used to modify variables, which are constants and cannot be modified once defined.

final double PI = 3.14;
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Global constants are defined with public static final

public static final double PI = 3.14;
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Constants can also be defined with the Enum type Enum

public enum MyEnum { MY_A(123), MY_B(456); private final int value; MyEnum(int value) { this.value = value; } public int getValue() { return value; } public static void main(String[] args) { System.out.println(MyEnum.MY_A.getValue()); }}Copy the code

The final keyword can be used to modify methods. Methods modified by final cannot be overridden. Methods modified by final are more efficient than non-final methods.

final void eat(a) {
	System.out.println("I am final method");
}
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The final keyword can be used to modify classes. Classes modified by final cannot be inherited and cannot be modified.

final class Persion(a) {}Copy the code

finally

try {
	// Block of program code
} catch(Exception e) {
	// Handle exceptions
} finally {
	/ / block
}
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finalize

Finalize is a method. If an object calls finalize, that object will be garbage collected.