在jdk1.5的环境下,有如下4条语句:
1
2
3
4
|
Integer i01 = 59 ;
int i02 = 59 ;
Integer i03 =Integer.valueOf( 59 );
Integer i04 = new Integer( 59 )。
i03==i04 是fasle
期他都是同一个对象
JVM中一个字节以下的整型数据会在JVM启动的时候加载进内存,
除非用new Integer()显式的创建对象,否则都是同一个对象
|
相关推荐
由于使用模板,所以只有一个Integer.h头文件 支持如下操作:>, >=, <, , ==, !=, +, +=, -, -=, *, =, /, /=,(输出);支持利用基本整数类型(int,unsigned,long long,……)和字符串(char和std::string)构造类型
int与integer的区别从大的方面来说是基本数据类型与其包装类的区别: int 是基本类型,直接存数值,而integer是对象,用一个引用指向这个对象 1.Java 中的数据类型分为基本数据类型和复杂数据类型 int 是...
LinkedList<Integer> ab=new LinkedList(); for(int i=0;i;i++) ab.add(i+1); for(;;){ if(ab.size()==0)break;//结束条件 int i=1; while(i!=M){ ab.add(ab.remove());//如果没有报到M这个数字的人将其从...
BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); int f = Integer.parseInt(br.readLine()); double c=5*(f-32); c=c/9; System.out.println("Changing it to Celsius is "+c); } }
javaInteger⼤数据运算 ⼤数据运算 package com.oracle.demo01; import java.math.BigDecimal; import java.math.BigInteger; public class DemoInteger{ public static void main(String[] args) { //四则运算:...
Integer i=new Integer(1); Integer j=new Integer(1); System.out.println(i==j);//false Integer m=1; Integer n=1; System.out.println(m==n);//true Integer x=128; Integer y=128; System.out.println(x==y);...
new Integer(32), new Integer(98), new Boolean(false),new Boolean(false)}, {"阿瓜", new Integer(85), new Integer(69), new Integer(154), new Boolean(true),new Boolean(false)}, }; ...
based on integer factorization or discrete logarithms (in finite fields or elliptic curves). However, if large enough quantum computers can be built, Shor’s algorithm will render them completely ...
我想很多程序员应该记得 ...Integer integer = new Integer(1); System.out.println(integer instanceof Integer); // true 2)声明一个 class 接口实现类的对象 obj,判断 obj 是否为 class 接口实现类的实例对象,
pagebean.setPageIndex(Integer.parseInt( pindex));//设置当前第几页 List<books> books = new BooksImpl().Select(pagebean);//分页显示所有的数据 if(books!=null){ int count = new BooksImpl()...
values.put(new Integer(12), loadBallView(resources,R.drawable.show2)); values.put(new Integer(11), loadBallView(resources,R.drawable.show3)); values.put(new Integer(10), loadBallView(resources,R....
values.put(new Integer(12), loadBallView(resources,R.drawable.show2)); values.put(new Integer(11), loadBallView(resources,R.drawable.show3)); values.put(new Integer(10), loadBallView(resources,R....
随便输入年份和月份,即会出现次月的日历 int year=0; int month=0; year=Integer.parseInt(JOptionPane.showInputDialog("请输入年份:")); month=Integer.parseInt... Calender cal=new Calender(year,month);
A为大数的值,可以是Integer类范围内或外的数。 方法相关(A为前面定义的大数) big_number_0.add(new BigInteger(“b”)) ···········加法,A加b big_number_0.subtract(new BigInteger(“b”)) ···...
Integer[] result = new Integer[src.length + length]; //新数组的前面部分的值与旧数组的值一样 //这是一种常用的拷贝数组的方法 System.arraycopy(src, 0, result, 0, src.length); return result; }
public void setImage(final SmartImage image, final Integer fallbackResource, final Integer loadingResource, final SmartImageTask.OnCompleteListener completeListener) { // Set a loading resource if...
A new heuristic algorithm is proposed for solving general integer linear programming problems. In the algorithm, the objective function hyperplane is used as a cutting plane, and then by introducing a...
myIntList.add(new Integer(0));// 2 Integer x = (Integer) myIntList.iterator().next();// 3 第3 行的类型转换有些烦人。通常情况下,程序员知道一个特定的list 里边放的是什么类型的数据。但是,这个类型转换是...
TreeMap, Integer> myTreeMap = new TreeMap, Integer>(); int n = 0; Object word = null; Object num = null; while (matcher.find()) { word = matcher.group(); n++; if (myTreeMap....
Private Declare Sub SetColorDepth Lib "MakePDF417.dll" (ByRef nDepth As Integer) Private Declare Sub GetColorDepth Lib ... tmp2 = New Bitmap(tmp) tmp.Dispose() PictureBox1.Image = tmp2 End Sub