java文本代码 java文本编码方式( 五 )


try {
if (content.getTransferData(DataFlavor.stringFlavor) instanceof String) {
b = true;
}
} catch (Exception e) {
}
return b;
}
/**
* 文本组件中是否具备复制java文本代码的条件
*
* @return true为具备
*/
public boolean isCanCopy() {
boolean b = false;
int start = this.getSelectionStart();
int end = this.getSelectionEnd();
if (start != end)
b = true;
return b;
}
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
if (e.getButton() == MouseEvent.BUTTON3) {
copy.setEnabled(isCanCopy());
paste.setEnabled(isClipboardString());
cut.setEnabled(isCanCopy());
pop.show(this, e.getX(), e.getY());
}
}
public void mouseReleased(MouseEvent e) {
}
}
java读取文本文件代码java读取文本文件的方法有很多 这个例子主要介绍最简单 最常用的BufferedReader类 完整例子如下 package net chinaunix blog hzm text;import java io BufferedReader;import java io FileReader;import java io IOException;public class ReadFile {private String path;public ReadFile(String filePath){path = filePath;}public String[] openFile() throws IOException{FileReader fr = new FileReader(path) BufferedReader textReader = new BufferedReader(fr) String[] textData = https://www.04ip.com/post/new String[readLines()];int i;for(i= ; ireadLines() i++){textData[i] = textReader readLine() }textReader close() return textData;}int readLines() throws IOException{FileReader fileToRead = new FileReader(path) BufferedReader bf = new BufferedReader(fileToRead) int numberOfLines = ;@SuppressWarnings( unused )String oneLine;while((oneLine = bf readLine()) != null){numberOfLines++;}bf close() return numberOfLines;}}package net chinaunix blog hzm text;import java io IOException;public class FileData {public static void main(String[] args) throws IOException{String filePath = C:/text txt ;try{ReadFile reader = new ReadFile(filePath) String[] content = reader openFile() int i;for(i= ;icontent length;i++){System out println(content[i]) }}catch(IOException e){System out println( 异常信息 + e getMessage()) }}}java io BufferedReaderThe buffer size may be specified or the default size may be used The default is large enough for most purposes In general each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream It is therefore advisable to wrap a BufferedReader around any Reader whose read() operations may be costly such as FileReaders and InputStreamReaders For example BufferedReader in = new BufferedReader(new FileReader( foo in )) will buffer the input from the specified file Without buffering each invocation of read() or readLine() could cause bytes to be read from the file converted into characters and then returned which can be very inefficient Programs that use DataInputStreams for textual input can be localized by replacing each DataInputStream with an appropriate BufferedReader java io FileReaderFileReader is meant for reading streams of characters For reading streams of raw bytes consider using a FileInputStream lishixinzhi/Article/program/Java/hx/201311/26249
JAVA解密文本代码的问题 。可以运行追加200分 。按照你同学的加密算法,只对英文小写字母进行了加密 , 原文和密文的对应关系如下:
原文:a b c d e f g h i j k l m n o p q r s t u v w x y z
密文:f g h i j k l m n o p q r s t u v w x y z { | } a b
怎么得到上述关系呢,其实是所有的字符都有一个对应的ASCII码,相关ASCII码如下:
可以看到v的ASCII码为118,+5为123,所以变为{
97 a

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