创建Character实例 Character类提供了唯一定义了char类型参数的构造器实例化对象 (1)public Character(char value) 静态方式获取Character实例引用 (1)public static Character valueOf(char c) Character实例方法 public char charValue()//返回此Character对象的char值 public int compareTo(Character get) //比较大小,返...
*/publicclassIntegerDemo{publicstaticvoidmain(String[] args){// 不麻烦的就来了// public static String toBinaryString(int i)System.out.println(Integer.toBinaryString(100));// public static String toOctalString(int i)System.out.println(Integer.toOctalString(100));// public static String toHexS...
private static int binarySearch0(int[] a, int fromIndex, int toIndex, int key) { //a -- arr -- {13, 24, 57, 69, 80} //fromIndex -- 0 //toIndex -- 5 //key -- 577 int low = fromIndex; //low=0 int high = toIndex - 1; //high=4 while (low <= high) { int mid ...
所有整型(Byte,Short,Long)的比较规律与Integer是一样的。 同时Character 对象也有CharacterCache 缓存 池,范围是 0 到 127。 除了Integer 可以通过参数改变范围外,其它的都不行。文章标签: Java 缓存 存储 关键词: Java特性 Java整型 Java缓存 缓存特性 缓存java 流...
(1)为了让基本类型的数据进行更多的操作, Java为每种基本类型提供了对应的包装类类型 byte -- Byteshort -- Short int--Integerlong -- Long float--Floatdouble -- Double char--Characterboolean -- Boolean (2) Integer 的构造方法 A:Integer i = new Integer(100); ...
import java.util.List; public class Test{ public static void main(String []args){ List<Integer> list=new ArrayList<>(); Integer in=1; Character ch='c'; Boolean bo=true; list.add(in); list.add(ch); list.add(bo); System.out.println(list); ...
* before IntegerCache is initialized. Care must be taken to not use * the valueOf method. */if(s==null){thrownewNumberFormatException("null");}if(radix<Character.MIN_RADIX){// 进制最小值是 2thrownewNumberFormatException("radix "+radix+" less than Character.MIN_RADIX");}if(radix>Characte...
packagecom.cya.test;importjava.util.ArrayList;importjava.util.List;publicclassTest{publicstaticvoidmain(String[]args){List<Integer>list=newArrayList<>();Integerin=1;Character ch='c';Boolean bo=true;list.add(in);list.add(ch);list.add(bo);System.out.println(list);}} ...
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public class ArrayDemo { public static void main(String[] args) { // 定义一个数组 int[] arr = { 24, 69, 80, 57, 13 }; System.out.println("排序前:"); printArray(arr); /* // 第一次比较 // arr.length - 1是为了防止数据越界 ...