01 / 07

📦

intdoublebooleancharCAST

02 / 07

🔀

if/elseforwhileswitchdo-while

03 / 07

🔧

voidreturnparamsOVERLOADPASS-BY-VALUE

04 / 07

📊

INDEXlengthfor-eachLINEAR SEARCH2D

05 / 07

🧱

classobjectthisextends@Override

06 / 07

📝

String.equals()substringStringBuilderIMMUTABLE

07 / 07

🔢

BUBBLESELECTIONINSERTIONArrays.sort()O(n²)