java编程思想课后习题答案

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1、Java编程思想（第四版）习题答案第二章练习1：publicclassPrimitiveTest{staticinti;staticcharc;publicstaticvoidmain(String[]args){System.out.println("int="+i);System.out.println("char="+c);}}练习2：publicclassHelloWorld{publicstaticvoidmain(String[]args){System.out.println("HelloWorld!");}}练习

2、3：publicclassATNTest{publicstaticvoidmain(String[]args){classATypeName{inti;doubled;booleanb;voidshow(){System.out.println(i);System.out.println(d);System.out.println(b);}}ATypeNamea=newATypeName();a.i=3;a.d=2.71828;a.b=false;a.show();}}练习4：publicclassDataOnlyTest{pu

3、blicstaticvoidmain(String[]args){classDataOnly{inti;doubled;booleanb;voidshow(){System.out.println(i);System.out.println(d);System.out.println(b);}}DataOnlydata=newDataOnly();data.i=3;data.d=2.71828;data.b=false;data.show();}}练习5：publicclassDOTest2{publicstaticvoidma

4、in(String[]args){classDataOnly{inti;doubled;booleanb;voidshow(){System.out.println(i);System.out.println(d);System.out.println(b);}}DataOnlydata=newDataOnly();data.i=234;data.d=2.1234545;data.b=true;data.show();}}练习6：publicclassStorageTest{publicstaticvoidmain(String

5、[]args){classStoreStuff{intstorage(Strings){returns.length()*2;}}StoreStuffx=newStoreStuff();System.out.println(x.storage("hi"));}}练习7：classStaticTest{staticinti=47;}classIncrementable{staticvoidincrement(){StaticTest.i++;}}publicclassITest{publicstaticvoidmain(Strin

6、g[]args){System.out.println("StaticTest.i="+StaticTest.i);StaticTestst1=newStaticTest();StaticTestst2=newStaticTest();System.out.println("st1.i="+st1.i);System.out.println("st2.i="+st2.i);Incrementablesf=newIncrementable();sf.increment();System.out.println("Aftersf.i

7、ncrement()called:");System.out.println("st1.i="+st1.i);System.out.println("st2.i="+st2.i);Incrementable.increment();System.out.println("AfterIncrementable.incrementcalled:");System.out.println("st1.i="+st1.i);System.out.println("st2.i="+st2.i);}}练习8：classStaticTest{s

8、taticinti=47;}classIncrementable{staticvoidincrement(){StaticTest.i++;}}publicclassOneStaticTest{publicstaticvoidmain(String[]args)