java基础阶段考试

科技前沿 • 2025-01-02 10:14 • 阅读 25

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java基础阶段考试

姓名黄艺javajava_home过多，不易于开发者的使用，配置classpath文件能使得开发者不用到class文件的所在目录下才能运行class文件。doublea=1/3;System.out.println(a); 结果分析和解释：13inta，adouble，intdoubleinta=intb=System.out.println(：a="+ab="+binttemp=a;a=b=System.out.println("交换之后：a="+a+",b="+binta=1;intb=System.out.println("交换之前：a="+a+",b="+ba=a+b=a–a= -System.out.println("交换之后：a="+a+",b="+binta=1;intb=System.out.println("交换之前：a="+a+",b="+ba=a^b=a^b;a=a^System.out.println("交换之后：a="+a+",b="+bintanewint[]{34,4,56,12,2}进行降序排publicstaticint[]sort(int[]a{for(inti=0;i<a.length-1;{for(intj=i+1;j<a.length;{if(a[j]>{inttemp=a[i];a[i]=a[j];a[j]=}}}return}classCar{publicStringcolor;publicStringfuel;//定义燃料类型publicfloatgas;//燃气publicdoubleoil;//publicCar(){}publicCar(Stringbrand,Stringcolor,Stringfuel,floatgas,doubleoil){this.brand=brand;this.fuel=fuel;this.gas=gas;this.oil=oil;}publicvoidrun(Stringfuel, gas){if(gas>0.0f{System.out.println("汽车使用fuel高速行驶起来了...现在还剩"+gas+"升燃气");}}publicvoidrun(Stringfuel,doubleoil){if(oil>0.0{System.out.println("汽车使用fuel高速行驶起来了...现在还剩"+oil+"升燃油");}}}abstractclass{publicStringname;publicStringcolor;}publicAnimal(Stringname,Stringcolor){=name;this.color=color;}publicabstractvoid}classBirdextends{}publicBird(Stringname,Stringcolor){super(name,color}publicvoidSystem.out.println(colorname}}classCrowextends{}publicCrow(Stringname,Stringcolor){super(name,color}}-6的补码 0111-6的补码：-0000- （正数的补码等于原码计算结果 0111- （补码class{publicintstatistics(inta){inttemp=0;for(inti=0;i<=a;i++{if(i%2==1)}return}} A B C D classGrade{publicvoidgrade(a){if(a>=90&&a<=elseif(a>=80&&a<=89)elseif(a>=70&&a<=79)elseif(a>=60&&a<=69)elseif(a>=0 &&a<=59)}classDiv{publicvoiddiv(inta,intb)throwsDivCalculateException{if(b==0){thrownewDivCalculateException("除数异常}System.out.println("a/b="+a/b}}classDivCalculateExceptionextends{public}message){super(message);}}class{publicstaticvoidmain(String[]args{{}

java基础阶段考试

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