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最新评论
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iloveflower:
呵呵。好好学习。。。。。。。。。。。。
java 读书 -
Eric.Yan:
看了一点,不过是电子版的……你这一说到提醒我了,还要继续学习哈 ...
java 读书
import java.util.*; public class AppendEle { public List<String> getAppendList(List<String> inputList) { List<String> result = new ArrayList<String>(); StringBuilder tsb = new StringBuilder(); for (int iCnt=0; iCnt< inputList.size()-1; iCnt++) { tsb.setLength(0); tsb.append(inputList.get(iCnt)).append(inputList.get(iCnt+1)); result.add(tsb.toString()); } result.add(inputList.get(inputList.size()-1)); return result; } public static void main(String[] args) { String[] myStrs = {"mmm", "nnn","tbbb", "ar you ok"}; //List<String> inputList = Arrays.asList(myStrs); List<String> inputList = new ArrayList<String>(); Collections.addAll(inputList, myStrs); AppendEle ae = new AppendEle(); System.out.println("result is " + ae.getAppendList(inputList)); } }
public class ChStrPalindrome { public boolean chStrPalinddrome(String original) { StringBuilder reverse = new StringBuilder(original); if ( original == null ) { return false; } else { reverse = reverse.reverse(); if ( reverse.toString().equals(original)) { System.out.println("the string is!"); return true; } else { System.out.println("the string is not!"); return false; } } } public static void main(String argv[]) { String inputString = "AAABBBBBBAAAA"; //inputString="I am a bad man"; Fix3ChStrPalindrome csp = new Fix3ChStrPalindrome(); csp.chStrPalinddrome(inputString); } }
import java.io.*; import java.util.*; public class Turtle { private String name; private Formatter f; public Turtle(String name, Formatter f) { this.name = name; this.f = f; } public void move(int x, int y) { f.format("%s The Turtle is at (%d,%d)\n", name, x, y); } public static void main(String[] args) { PrintStream outAlias = System.out; Turtle tommy = new Turtle("Tommy", new Formatter(System.out)); Turtle terry = new Turtle("Terry", new Formatter(outAlias)); tommy.move(0,0); terry.move(4,8); tommy.move(3,4); terry.move(2,5); tommy.move(3,3); terry.move(3,3); } } /*
f.format("s: %s\n", u);
%[argument_index$][flags][width][.precision]conversion
The optional argument_index is a decimal integer indicating the position of the argument in the argument list. The first argument is referenced by "1$", the second by "2$", etc.
The optional flags is a set of characters that modify the output format. The set of valid flags depends on the conversion.
The optional width is a non-negative decimal integer indicating the minimum number of characters to be written to the output.
The optional precision is a non-negative decimal integer usually used to restrict the number of characters. The specific behavior depends on the conversion.
The required conversion is a character indicating how the argument should be formatted. The set of valid conversions for a given argument depends on the argument's data type.
java各类型互转
如何将字串 String 转换成整数 int?
int i = Integer.valueOf(my_str).intValue();
int i=Integer.parseInt(str);
如何将字串 String 转换成Integer ?
Integer integer=Integer.valueOf(str);
如何将整数 int 转换成字串 String ?
1.) String s = String.valueOf(i);
2.) String s = Integer.toString(i);
3.) String s = "" + i;
如何将整数 int 转换成Integer ?
Integer integer=new Integer(i);
如何将Integer 转换成字串 String ?
Integer integer=String
如何将Integer 转换成 int ?
int num=Integer.intValue();
如何将String转换成 BigDecimal ?
BigDecimal d_id = new BigDecimal(str);
如何将 String 转换成 char ?
char[] ca="123".toCharArray();
如何将character转换成String?
String s=ca.toString(); //任何类型都可以采用toString()转换成String类型
如何转char:
String s = String.valueOf(ca); no toString()method
//-----------------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);
获取今天的日期字符串
String today=java.text.DateFormat.getDateInstance().format(new java.util.Date());
获取今天的日期
new java.sql.Date(System.currentTimeMillis())
发表评论
-
Java Collection summary
2012-06-16 02:40 566Collection:List、Set Map: ... -
When to use Comparable vs Comparator
2012-06-15 00:52 787I have a list of objects I need ... -
Arrays.fill with multidimensional array in Java
2012-06-15 00:09 685How can I fill a multidimension ... -
Immutable objects
2012-06-14 23:49 707Immutable objects are simply ... -
Implementing hashCode; Transaction.java
2012-06-14 23:43 814Below is the syntax highlight ... -
Lazy initialization
2012-06-14 22:48 798http://www.javapractices.com/to ... -
How to sort an array,mid of linkedlist, reverse int
2012-06-13 07:47 932A common mistake for a beginner ... -
Java各类型转换
2012-06-13 05:25 693各种数字类型转换成字符串型: String s = Str ... -
regular expression
2012-06-13 03:08 5101、Java对反斜线处理的 ... -
String array to arraylist
2012-06-13 00:07 574There are some important thing ... -
core java interview summary
2012-06-12 04:11 377http://blog.sina.com.cn/s/blog_ ... -
programming with String
2012-06-12 01:43 549Question: 1) Write code to che ... -
OO Design books -good website
2012-06-07 03:13 691I’m always on the search on goo ... -
Write a String Reverser (and use Recursion!)
2012-06-07 03:03 519Java Interview questions: Write ... -
Java高手必会的要点
2012-05-29 03:28 604http://developer.51cto.com/art/ ... -
How to use getClass().getClassLoader().getResource()
2012-05-29 03:13 1743This is the simplest wat to get ... -
How to override equals method in Java
2012-05-12 02:57 1532Object class holds some very in ... -
Top 30 Programming interview questions
2012-05-12 02:48 902Programming questions are integ ... -
10 example of using ArrayList in Java >>> Java ArrayList Tutorial
2012-05-12 02:37 869ArrayList in Java is most frequ ... -
How to use Comparator and Comparable in Java? With example
2012-05-12 02:21 761Read more: http://javarevisited ...
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