文档介绍：:..lasshomework_l_07{publicstaticvoidmain(String[]args)'1););}}(;[Applet;lasshomework_l_08extendsJApplet{publicvoidpaint(Graphicsg){,0,getWidth(),getHeight());lasshomework_2_03{publicstaticvoidmain(String[]args){}}lasshomework_2_06{publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodstubfor(inta=l;a<5;a++){spacenum(4-a);starnum(a);}for(inta=0;a<4;a++){ spacenum(a+l);starnum(3-a);}}/**输11!每一行星星的个数*/publicstaticintstarnum(inta)〃输出何一彳j•的星星个数{ intm二num(a);for(inti=0;i<m;i++){ (,,*H);}();return0;}/和算出每一行星星的个数*/publicstaticintnumfinta)〃计算每行星星个数{returna*2-l; }/粋输出每一行的牢格数 */ 一publicstaticintspacenum(inta)〃输出每行星星个数{for(inti=0;i<a;i++){("H); }return0;} }lasshomework_2_09{publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstubfor(inta=l;a<5;a++){if(a!=4){spacenum(4-a);starnum(a);}if(a==4){for(intb=l;b<4;b++){(,,*H);}(,,+H);for(intb=l;b<3;b++){(,,*,,);}(”*”); }}for(inta=0;a<4;a++){spacenum(a+l);starnum(3-a);}}/材输出每一行星星的个数*7publicstaticintstarnumfinta)〃输出每—行的星星个数{intm二num(a);for(inti=0;i<m;i++){(,,*n);}();return0;}/材算出每一行星星的个数*/publicstaticintnum(inta)〃计算每行星星个数{returna*2-l;}/粋输出每一行的空格数*/ 一publicstaticintspacenum(inta)〃输出每行星星个数{for(inti=0;i<a;i++){); }return0;} }lasshomework_2_10{publicstaticvoidmain(String[]args){booleanflag=false;forfintn=50;nv=100;n++){ flag=WeatherPrime(n);if(flag==true){(n); }}}publicstaticbooleanWeatherPrime(intnum){for(inti=2;ivnum;i++){讦(num%i!=0) {continue;}else{returnfalse;} }returntrue;}}lasshomework_2_ll{publicstaticvoidmain(String[]args){longresult=0;for(intn=l;nv二20;n++){result+=num(n);}(result); }publicstaticintnum(inti){return(int)(i/i); }}第三章:lasshomework_3_06{public