Java) List/ Stack/ Arrays Comparator/ Comparable Iterator
This post was migrated from Tistory. You can find the original here. List ArrayList(Vector) When you remove an element, every element below it gets copied up one slot to overwrite the remo...
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Java) lang/ Object/ StringBuffer/ equals
This post was migrated from Tistory. You can find the original here. java.lang package Object The Object class is the ultimate ancestor of every class. By default, Object.equals() compares inst...
Java) static import / Exception Handling
This post was migrated from Tistory. You can find the original here. static import import static java.lang.System.out; import static java.lang.Math.*; out.println(random()); A regular import ...
Java) Variable Initialization / Modifiers / Polymorphism / Interfaces / Anonymous Classes
This post was migrated from Tistory. You can find the original here. Member Variable Initialization class InitTest{ int x; int y = x; // Member variables get a default value even without...
Java) Wrapper / Expressions / Labeled Loops
This post was migrated from Tistory. You can find the original here. type check Wrapper class type public static void main(String[] args) { String t1 = "TEST"; System.out.pr...
Java) JDK / JVM / Runtime Data Areas
This post was migrated from Tistory. You can find the original here. What the JDK is made of JDK: the development kit, which includes Java itself JRE: the Java runtime environment How it runs...