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// program id : 2 // 1. ชนิดข้อมูลพื้นฐาน 6 แบบจาก 8 แบบ // 2. แบบ boolean ไม่มีการระบุว่าใช้พื้นที่เท่าใด public class j0101 { public static void main(String args[]) { // 1. boolean true of false boolean b = true; System.out.println("boolean = "+b); // 2. character (2 Bytes) accept unicode char y; y = 'a'; // 97 System.out.println("character = "+y); y = 65; // A System.out.println("character = "+y); // 3. byte -2^7 to 2^7-1 (1 Byte) byte c; c = 127; System.out.println("byte = "+c); c = (byte)129; // = -127 = 1000 0001 System.out.println("byte = "+c); c = (byte)130; // = -126 = 1000 0010 = 0111 1110 System.out.println("byte = "+c); // 4. short -2^15 to 2^15-1 (2 Bytes) short a; a = 32767; System.out.println("Short = "+a); // 5. integer -2^31 to 2^31-1 (4 Bytes) int x; x = 2147483647; System.out.println("Integer = "+x); // 6. long -2^63 to 2^63-1 (8 Bytes) long b; b = 9223372036854775807L; System.out.println("long = "+b); // sequence of translate System.out.println(1+1+"1"+1+1); // 2111 System.out.println("0"+1+ 1 + "1"); // 0111 } } |