sysout = new PrintStream(System.out, true, "UTF-8");
sysout.println("u0B95u0bbe");

System.out.println( "\u" + Integer.toHexString('க' | 0x10000).substring(1) );

String foo = "கா";
for (int i = 0; i < foo.length(); i++)
    System.out.println( "\u" + Integer.toHexString(foo.charAt(i) | 0x10000).substring(1));

u0b95
u0bbe

String str = "கா";
for(char ch : str.toCharArray())
   System.out.format("\u%04x", (int) ch);