import java.nio.ByteBuffer;
public class CharUtil {
public static final int LARGE_CHARS_THRESHOLD = 1024;
public static char[] merge(char[] chars0, char[] chars1) {
if (chars0.length == 0) {
return chars1;
} else if (chars1.length == 0) {
return chars0;
}
int capacity = chars0.length + chars1.length;
char[] chars = new char[capacity];
int pos = 0;
int length = chars0.length;
System.arraycopy(chars0, 0, chars, pos, length);
pos += length;
length = chars1.length;
System.arraycopy(chars1, 0, chars, pos, length);
return chars;
}
public static byte[] toBytes(char[] chars) {
return CharToByte.toBytes(chars);
}
public static byte[] toAsciiBytes(char[] chars) {
return CharToByte.toAsciiBytes(chars);
}
public static String toUnicodeString(char c) {
return Integer.toHexString((int) c);
}
public static String toUnicodeString(String s) {
StringBuilder builder = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
if (i > 0) {
builder.append(' ');
}
builder.append(toUnicodeString(s.charAt(i)));
}
return builder.toString();
}
public static void main(String[] args) throws Exception {
String s = "fudan1988";
char[] chars = s.toCharArray();
byte[] bytes = toBytes(chars);
ByteBuffer byteBuffer = ByteBuffer.allocate(bytes.length);
byteBuffer.put(bytes);
byteBuffer.flip();
char[] chars1 = new char[chars.length];
for (int i = 0; i < chars1.length; i++) {
chars1[i] = byteBuffer.getChar();
}
for (int i = 0; i < chars.length; i++) {
assert chars[i] == chars1[i];
}
}
}
