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StringתCharacterÊý×飬ÓÃCharacterµÄisDigitºÍisLetterº¯ÊýÈ¥Åжϡ£
public static boolean isNumeric(String str) {
for (int i = str.length(); i = 0;) {
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
public static boolean isNumeric(String str) {
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches();
}
public static boolean isNumeric(String str) {
if (str.matches("““d*")) {
return true;
}
return false;
}
public static boolean isNumeric(String str) {
for (int i = str.length(); i = 0;) {
int chr = str.charAt(i);
if (chr 48chr 57)
return false;
}
return true;
}


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long¡¢java.lang.Long
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float¡¢java.lang.Float
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/Download   by   HTTP  
//For   other   protocol,   do   it   yourself  
import   java.net.*;  
import   java.io.*;  
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Apache MINA (mina-2.0.0-M6Ô´ÂëΪÀý):
    ÎÒÃÇʹÓÃmina nio tcp×î³£ÓõÄÑùÀýÈçÏÂ:
        NioSocketAcceptor acceptor = new NioSocketAcceptor(/*NioProcessorPool's size*/);
        DefaultIoFilterChainBuilder cha ......

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