JAVA编程思想第四版课后答案.docx

1、JAVA编程思想第四版课后答案Java编程思想（第四版）习题答案第二章练习1：public class PrimitiveTest static int i; static char c; public static void main(String args) System.out.println(int = + i); System.out.println(char = + c); 练习2：public class HelloWorld public static void main(String args) System.out.println(Hello World!); 练习3：pu

2、blic class ATNTest public static void main(String args) class ATypeName int i; double d; boolean b; void show() System.out.println(i); System.out.println(d); System.out.println(b); ATypeName a = new ATypeName(); a.i = 3; a.d = 2.71828; a.b = false; a.show(); 练习4：public class DataOnlyTest public stat

3、ic void main(String args) class DataOnly int i; double d; boolean b; void show() System.out.println(i); System.out.println(d); System.out.println(b); DataOnly data = new DataOnly(); data.i = 3; data.d = 2.71828; data.b = false; data.show(); 练习5：public class DOTest2 public static void main(String arg

4、s) class DataOnly int i; double d; boolean b; void show() System.out.println(i); System.out.println(d); System.out.println(b); DataOnly data = new DataOnly(); data.i = 234; data.d = 2.1234545; data.b = true; data.show(); 练习6：public class StorageTest public static void main(String args) class StoreSt

5、uff int storage(String s) return s.length() * 2; StoreStuff x = new StoreStuff(); System.out.println(x.storage(hi); 练习7：class StaticTest static int i = 47;class Incrementable static void increment() StaticTest.i+; public class ITest public static void main(String args) System.out.println(StaticTest.

6、i= + StaticTest.i); StaticTest st1 = new StaticTest(); StaticTest st2 = new StaticTest(); System.out.println(st1.i= + st1.i); System.out.println(st2.i= + st2.i); Incrementable sf = new Incrementable(); sf.increment(); System.out.println(After sf.increment() called: ); System.out.println(st1.i = + st

7、1.i); System.out.println(st2.i = + st2.i); Incrementable.increment(); System.out.println(After Incrementable.increment called: ); System.out.println(st1.i = + st1.i); System.out.println(st2.i = + st2.i); 练习8：class StaticTest static int i = 47;class Incrementable static void increment() StaticTest.i+

8、; public class OneStaticTest public static void main(String args) System.out.println(StaticTest.i= + StaticTest.i); StaticTest st1 = new StaticTest(); StaticTest st2 = new StaticTest(); System.out.println(st1.i= + st1.i); System.out.println(st2.i= + st2.i); Incrementable.increment(); System.out.prin

9、tln(After Incrementable.increment() called: ); System.out.println(st1.i = + st1.i); System.out.println(st2.i = + st2.i); Incrementable.increment(); System.out.println(After Incrementable.increment called: ); System.out.println(st1.i = + st1.i); System.out.println(st2.i = + st2.i); st1.i = 3; System.

10、out.println(After st1.i = 3, ); System.out.println(st1.i = + st1.i); System.out.println(st2.i = + st2.i); System.out.println(Create another StaticTest, st3.); StaticTest st3 = new StaticTest(); System.out.println(st3.i = + st3.i); 练习9：public class AutoboxTest public static void main(String args) boo

11、lean b = false; char c = x; byte t = 8; short s = 16; int i = 32; long l = 64; float f = 0.32f; double d = 0.64; Boolean B = b; System.out.println(boolean b = + b); System.out.println(Boolean B = + B); Character C = c; System.out.println(char c = + c); System.out.println(Character C = + C); Byte T =

12、 t; System.out.println(byte t = + t); System.out.println(Byte T = + T); Short S = s; System.out.println(short s = + s); System.out.println(Short S = + S); Integer I = i; System.out.println(int i = + i); System.out.println(Integer I = + I); Long L = l; System.out.println(long l = + l); System.out.pri

13、ntln(Long L = + L); Float F = f; System.out.println(float f = + f); System.out.println(Float F = + F); Double D = d; System.out.println(double d = + d); System.out.println(Double D = + D); 练习10：public class CommandArgTest public static void main(String args) intargs1=1,2,3; System.out.println(args0 = + args10); System.out.println(args1 = + args11); System.out.println(args2 = + args12); 练习11：public class Rainbow public static void main(String args) AllTheColorsOfTheRainbow atc = new AllTheColorsOfTheRainbow(); System.out.println(atc.anIntegerRepresenti