Java數(shù)據(jù)類(lèi)型中String、Integer、int相互間的轉(zhuǎn)換

1.Integer轉(zhuǎn)換成int的方法

Integer i = new Integer(10); 
int k = i.intValue();
即Integer.intValue();

2.int轉(zhuǎn)換成Integer

int i = 10;

Integer it = new Integer(i);

3.String轉(zhuǎn)換成int的方法

String str = "10";  
Integer it = new Interger(str);  

int i = it.intValue();  

即：int i = Integer.intValue(string);

4.int轉(zhuǎn)換成String

int i = 10;

(1)String s = String.valueOf(i);

(2)String s = Ingeger.toString(i);

(3)String s = "" + i;

5.String轉(zhuǎn)換成Integer

String str = "10";

Integer it = Integer.valueOf(str);

6.Integer轉(zhuǎn)換成String

Integer it = new Integer(10);

String str = it.toString();

7.String轉(zhuǎn)換成BigDecimal

BigDecimal bd = new BigDecimal(str);

8.日期

Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH)+1;
int day = calendar.get(Calendar.DATE);

//獲取今天的日期字符串
String today = java.text.DateFormat.getDateInstance().format(new java.util.Date());
//獲取今天的日期
new java.sql.Date(System.currentTimeMillis());

posted on 2011-02-28 14:12 小羅 閱讀(118530) 評(píng)論(5)  編輯  收藏