java課后習(xí)題答案

1、.111JavaJava 24 a= ; b= ; c= ;System.out.println(int)a+,+(int)b+,+(int 34 for( a= ;a=out 35 i= JiechengSystem.out Jiecheng( =if=i*Jiecheng 37 . whilea+=JiechengifSystem.out Jiecheng( if=i*Jiecheng 4 4142434445 46和47.48494；551 和525354 A B ab55） ） ） ） 和56576616263.64； ；65；77172737412755 fora:Color.val

2、uesforb:Color.valuesforc:Color.valuesifSystem.out.println(a+,+b+,System.out 紅 黃 藍(lán) 綠 黑, , , , 881.8283848596 991A： 把 B C:abc=abc D:”abc”.equals(“abc”) 92 E love93 E15；abc949596 = hello;= World;=System.out=System.out.println(str3);=System.out97 . = World!; a=System.outa=System.out98 = Scanner(System.i

3、nSystem.out.println(請(qǐng)輸入年份和月份，輸入一次按一次回車 x= y= a=char= for( System.out.printf(%7cfor( i=0;ia.lengthifSystem.outSystem.out.printf(%4s day; =0, = SetYear( this. SetMonth( .this. = a= =Calendar.getInstancerill.set(year, month =rill.get(Calendar.DAY_OF_WEEK if(month=1|=3|=7|=8|=10|if( 4| 6| 9| =if( if(yea

4、r%4=0&year%100!=0|year =for( ai=;for( ai=String.valueOffor( i=weekDay+day;ia.lengthai=; 99 =Calendar.getInstance= Scanner(System.inSystem.out.println( =System.out.println(. =System.out.println( = =System.out.println(=System.out.println( =System.out.println(= =out.println(+sub+10略10919，編寫程序剔除一個(gè)字符串中的全

5、部非數(shù)字字符，例如，將形如“abc123you”的非數(shù)字字符全部剔除得到字符串“123 = D1,;p=Ppiles= abc123you;m=System.out.println(剔除以后的字符串=m.replaceAll(System.out10921Scanner877696 . = 8776分，英語96分;= scanner.useDelimiter(0123456789+ =while = =System. .println(+sum+101如果準(zhǔn)備按字節(jié)讀取一個(gè)文件的內(nèi)容，應(yīng)當(dāng)使用FileInputStreamFileReader102FileInputStreamreadFile

6、Reader流的read103BufferedReaderBufferedReaderReader子類的對(duì)象，來創(chuàng)建一個(gè)104ObjectInputStreamObjectOutputStreamObjectOutputStreamOutputStream的子類創(chuàng)建一個(gè)輸出流。同樣ObjectInputStreamInputStream105106RandomAccessFile = null;. = RandomAccessFile(tom.dat,rwfor( i=0;idata.lengthfor( i=data.lengthSystem. .printf(t%dcatch107java108略1092567/臺(tái)3562/臺(tái)6573/臺(tái) = File(cost