Weil Jimmer's BlogWeil Jimmer's Blog


改變URL又不刷新或訪問網站的方法 JavaScript
No Comments

發布:2015-07-02 23:27:32

window.history.pushState("str", "title", "/new_url");

改變URL又不刷新或訪問網站的方法。


This entry was posted in General By Weil Jimmer.

int 和 Integer 的比較 Java 程式設計
No Comments

發布:
更新:2017-05-19 19:47:56

int test_int_1 = 1;
int test_int_2 = 1;
System.out.println(test_int_1==test_int_2);//true
int test_int_3 = new Integer(1);
int test_int_4 = new Integer(1);
System.out.println(test_int_3==test_int_4);//true
int test_int_5 = new Integer("1");
int test_int_6 = new Integer("1");
System.out.println(test_int_5==test_int_6);//true
int test_int_7 = Integer.valueOf(1);
int test_int_8 = Integer.valueOf(1);
System.out.println(test_int_7==test_int_8);//true
int test_int_9 = Integer.valueOf("1");
int test_int_10 = Integer.valueOf("1");
System.out.println(test_int_9==test_int_10);//true
Integer test_integer_1 = 1;
Integer test_integer_2 = 1;
System.out.println(test_integer_1==test_integer_2);//true
System.out.println(test_integer_1.equals(test_integer_2));//true
Integer test_integer_3 = new Integer("1");
Integer test_integer_4 = new Integer("1");
System.out.println(test_integer_3==test_integer_4);//false
System.out.println(test_integer_3.equals(test_integer_4));//true
Integer test_integer_5 = Integer.valueOf("1");
Integer test_integer_6 = Integer.valueOf("1");
System.out.println(test_integer_5==test_integer_6);//true
System.out.println(test_integer_5.equals(test_integer_6));//true

據我實驗觀察,所得 只要是 int==int 的比較,一定是比較值,若為Integer==int,也一定是比較其值。

唯一為False的情況是當有new出現時:

new Integer("1")==new Integer("1");//false

用 valveOf 得出來的 Integer 類別,進行比較(==),也是 valueOf括號內的值(不管類別是String還是int…)(都小於等於127大於等於負128的情況)是否相等。

test_integer_6 = Integer.valueOf("1");
Integer test_integer_7 = Integer.valueOf(1);
System.out.println(test_integer_6==test_integer_7);//true
System.out.println(test_integer_6.equals(test_integer_7));//true

System.out.println(test_integer_1==test_integer_3);//false
System.out.println(test_integer_1.equals(test_integer_3));//true
System.out.println(test_integer_5==test_integer_3);//false
System.out.println(test_integer_5.equals(test_integer_3));//true
System.out.println(test_integer_7==test_integer_3);//false
System.out.println(test_integer_7.equals(test_integer_3));//true

若 Integer 比較 Integer ,其中之一關鍵字有 new ,== 比較子出來的結果可能就為 False 。

以下為特殊例子!數值小於等於127大於等於負128時不會new,但若不在此區間時,就會以new宣告。

以new宣告的時候==通常都是false,

進行 比較 int 時若其值相同會轉發True。

Integer test_special_1 = Integer.valueOf(127);//等於Integer test_special_1 = 127;
Integer test_special_2 = Integer.valueOf(127);
System.out.println(test_special_1==test_special_2);//true
System.out.println(test_special_1.equals(test_special_2));//true
Integer test_special_3 = Integer.valueOf(128);//等於Integer test_special_1 = 128;
Integer test_special_4 = Integer.valueOf(128);
System.out.println(test_special_3==test_special_4);//false
System.out.println(test_special_3.equals(test_special_4));//true

若本人有誤,歡迎更正。


This entry was posted in Experience, Functions, Java By Weil Jimmer.

Android Java 複製純文字至剪貼簿
No Comments

發布:2015-06-27 15:14:39

ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE); 
ClipData clip = ClipData.newPlainText("label", "Text to copy");
clipboard.setPrimaryClip(clip);

This entry was posted in Java By Weil Jimmer.

異步任務Java Android
No Comments

發布:
更新:2015-07-10 16:34:11

 public class ExcuteAsyncTaskOperation extends AsyncTask<Void, Integer, String>{

        @Override
        protected void onPreExecute() {
            //執行UI設定
            super.onPreExecute();
        }

        @Override
        protected String doInBackground(Void... params) {
            //進行背景工作,如「Network」,並可轉發值。
            //在迴圈中使用publishProgress((onProgressUpdate引數類別)變數);以傳遞資料。
            //例如publishProgress((int)50);
            return null;
        }

        @Override
        protected void onProgressUpdate(Integer... progress) {
            //設定更新進程條
            //setProgressPercent(progress[0]);
        }

        @Override
        protected void onPostExecute(String result) {
            //結束,更新UI介面
            super.onPostExecute(result);
        }
    }

運行方法

    new ExcuteAsyncTaskOperation().execute();

This entry was posted in Java, Note By Weil Jimmer.

純筆記
No Comments

發布:2015-05-28 21:22:20

不解釋。

http://drops.wooyun.org/category/mobile


This entry was posted in Note By Weil Jimmer.

最前頁 上一頁  6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 /25 頁)下一頁 最終頁

Visitor Count

pop
nonenonenone

Note

重啟核四,關閉維修火力發電廠,減少空氣汙染,以核能養綠能。

支持網路中立性.
Support Net Neutrality.

Celebration for General Data Protection Regulation.

隨時注意自己的CPU使用狀態,有不少網站會沒有徵求同意就用您的電腦挖礦。

不用 Line 改用 Telegram。跟上最新潮流。

支持臺灣實施無條件基本收入

歡迎前來本站。

Words Quiz


Search

Music

Counter

2301
天前是本網站的生日

Republic Of China
The strong do what they can and the weak suffer what they must.

Privacy is your right and ability to be yourself and express yourself without the fear that someone is looking over your shoulder and that you might be punished for being yourself, whatever that may be.

It is quality rather than quantity that matters.

I WANT Internet Freedom.

Reality made most of people lost their childishness.

Justice,Freedom,Knowledge.

Support/Donate

This site also need a little money to maintain operations, not entirely without any cost in the Internet. Your donations will be the best support and power of the site.
MethodBitcoin Address
bitcoin1NRMVGGpm2T1pmeejisLSEhCXfCefEW9V4
paypal
Register in linode via invitation link and stay active for three months.Linode

The Lie We Live

The Lie We Live

The Questions We Never Ask

The Questions We Never Ask

Support The Zeitgeist Movement

The Zeitgeist Movement

Man

Man

In The Fall

In The Fall

Facebook is EATING the Internet

Facebook

Categories

Android (7)

Announcement (4)

Arduino (2)

Bash (2)

C (3)

C# (5)

C++ (1)

Experience (42)

Flash (2)

Free (13)

Functions (36)

Games (13)

General (50)

HTML (7)

Java (13)

JS (7)

Mood (24)

Note (28)

Office (1)

PHP (9)

Privacy (4)

Product (12)

Python (4)

Software (11)

The Internet (16)

Tools (14)

VB.NET (8)

WebHosting (7)

Wi-Fi (5)

XML (4)