shift supervisor class java

ArrayListAn array-based implementation is essentially a variable-length array of object references that can dynamically increase or decrease its size.is not thread-safe and can only be used in a single-threaded environment. You can consider using the Collection.synchronizedlist (List L) function to return a thread-safe ArrayList class in a multithreaded environment, or you can use the concurrent concurrent packageCopyonwritearraylist classThe followin

;Equals (): Judge whether two number is equal, can also use CompareTo to replace;Min (), Max (): Take two numbers of smaller, larger ones;Intvalue (), Longvalue (), Floatvalue (), double (): Converts the number to the value of the number of that type.ToString (x): You should use the. ToString (x) method to convert the result of the calculation to an X-binary string, usually x default, and the default is decimal.Type conversions:BigInteger int:int a = 3;BigInteger B = biginteger.valueof (a);BigIn

} ------------------------------------------------------ - code to write: - int[] arr = {13, 24, 57, 69, 80}; -System.out.println ("BinarySearch:" + arrays.binarysearch (arr, 577)); - in source code for BinarySearch: - Public Static intBinarySearch (int[] A,intkey) { to //A-arr--{ ------- + //Key--577 - returnBinarySearch0 (A, 0, A.length, key); the } * $ Private Static intBinarySearch0 (int[] A,intFromIndex,intToindex,Panax Notoginseng intkey) { - //A-arr--{ ------- the //FromIndex--0 + //T

representation and converted to a decimal System.out.println (Integer.parseint ("3C", 16));}}Automatic packing and unpackingpublic class Main {public static void main (string[] args) {integer a = new Integer ("3"); integer b = new Integer (3); System.out.println (A = = B);//Two new addresses must be different System.out.println (A.equals (b));//equals compares content System.out.println ( A.compareto (b)); int num = 5;num++;integer Xinteger = 5;//xin