]]>
public class ClassDemo2
{ 3
public ClassDemo(){}4
5
public static void main(String[] args)6
{7
ClassDemo test=new ClassDemo();8
System.out.println("The class of test is:"+test.getClass().getName());9
try{10
Class c=Class.forName("java.lang.Object");11
System.out.println(c.getPackage()+"\t");12
System.out.println(c);13
java.lang.reflect.Method[] m=c.getMethods();14
System.out.println("The element in String[] is:"+String[].class.getComponentType());15
System.out.println((new int[3][4][5][6]).getClass().getName());16
System.out.println("The method defined in Object class:");17
for(int i=0; i<m.length; i++)18
{19
System.out.println(m[i]);20
}21
}22
catch(ClassNotFoundException e)23
{24
e.printStackTrace();25
}26
}27
}]]>
1public class ComplexNumber
2{
3 private double x,y;
4
5 public ComplexNumber(double real,double imaginary)
6 {
7 this.x=real;
8 this.y=imaginary;
9 }
10
11 public double real()
12 {
13 return x;
14 }
15
16 public double imaginary()
17 {
18 return y;
19 }
20
21 public double magnitude()
22 {
23 return Math.sqrt(x*x+y*y);
24 }
25
26 public String toString()
27 {
28 return "{"+x+","+y+"}";
29 }
30
31 public static ComplexNumber add(ComplexNumber a,ComplexNumber b)
32 {
33 return new ComplexNumber(a.x+b.x,a.y+b.y);
34 }
35
36 public ComplexNumber add(ComplexNumber a)
37 {
38 return new ComplexNumber(this.x+a.x,this.y+a.y);
39 }
40
41 public static ComplexNumber multiply(ComplexNumber a,ComplexNumber b)
42 {
43 return new ComplexNumber(a.x*b.x-a.y*b.y,a.x*b.y+a.y*b.x);
44 }
45
46 public ComplexNumber multiply(ComplexNumber a)
47 {
48 return new ComplexNumber(x*a.x-y*a.y,x*a.y+y*a.x);
49 }
50}
public class ComplexNumber2
{3
private double x,y;4
5
public ComplexNumber(double real,double imaginary) 6
{7
this.x=real;8
this.y=imaginary;9
}10
11
public double real()12
{13
return x; 14
}15
16
public double imaginary()17
{ 18
return y; 19
}20
21
public double magnitude()22
{ 23
return Math.sqrt(x*x+y*y); 24
}25
26
public String toString()27
{ 28
return "{"+x+","+y+"}"; 29
}30
31
public static ComplexNumber add(ComplexNumber a,ComplexNumber b) 32
{33
return new ComplexNumber(a.x+b.x,a.y+b.y);34
}35
36
public ComplexNumber add(ComplexNumber a) 37
{38
return new ComplexNumber(this.x+a.x,this.y+a.y);39
}40
41
public static ComplexNumber multiply(ComplexNumber a,ComplexNumber b) 42
{43
return new ComplexNumber(a.x*b.x-a.y*b.y,a.x*b.y+a.y*b.x);44
}45
46
public ComplexNumber multiply(ComplexNumber a) 47
{48
return new ComplexNumber(x*a.x-y*a.y,x*a.y+y*a.x);49
}50
}]]>
1import java.io.*;
2public class ArrayPrint
3{
4 private int N;
5 private int[][] intarray;
6 ArrayPrint()
7 {
8 N=5;
9 intarray=new int[N][N];
10 }
11 ArrayPrint(int n)
12 {
13 N=n;
14 intarray=new int[N][N];
15 }
16 public void Print()
17 {
18 int i=0,j=0;
19 int i0=0,j0=0;
20 int count=1;
21 int Num=N-1;
22 while(Num>0)
23 {
24 for(i=i0,j=j0;j<Num;j++,count++)
25 {
26 intarray[i][j]=count;
27 }
28 for(i=i0;i<Num;i++,count++)
29 {
30 intarray[i][j]=count;
31 }
32 for(j=Num;j>j0;j--,count++)
33 {
34 intarray[i][j]=count;
35 }
36 for(i=Num;i>i0;i--,count++)
37 {
38 intarray[i][j]=count;
39 }
40 i0++;
41 j0++;
42 Num--;
43 }
44 if(N%2!=0)
45 {
46 intarray[N/2][N/2]=count;
47 }
48 for(i=0;i<N;i++)
49 {
50 for(j=0;j<N;j++)
51 {
52 String ar="0";
53 if(intarray[i][j]/10<1)
54 {
55 ar=" "+intarray[i][j];
56 }
57 else if(intarray[i][j]/100<1 && intarray[i][j]/10>=1)
58 {
59 ar=" "+intarray[i][j];
60 }
61 System.out.print(ar+" ");
62 }
63 System.out.println();
64 }
65 }
66 public static void main(String[] args) throws IOException
67 {
68 int order=0;
69 System.out.println("Please input the order of the square:(<10:)");
70 order=System.in.read();
71 order=order-'0';
72 ArrayPrint arr=new ArrayPrint(order);
73 arr.Print();
74 }
75}
import java.io.*;2
public class ArrayPrint3
{4
private int N;5
private int[][] intarray;6
ArrayPrint()7
{8
N=5;9
intarray=new int[N][N];10
}11
ArrayPrint(int n)12
{13
N=n;14
intarray=new int[N][N];15
}16
public void Print()17
{18
int i=0,j=0;19
int i0=0,j0=0;20
int count=1;21
int Num=N-1;22
while(Num>0)23
{24
for(i=i0,j=j0;j<Num;j++,count++)25
{26
intarray[i][j]=count;27
}28
for(i=i0;i<Num;i++,count++)29
{30
intarray[i][j]=count;31
}32
for(j=Num;j>j0;j--,count++)33
{34
intarray[i][j]=count;35
}36
for(i=Num;i>i0;i--,count++)37
{38
intarray[i][j]=count;39
}40
i0++;41
j0++;42
Num--;43
}44
if(N%2!=0)45
{46
intarray[N/2][N/2]=count; 47
}48
for(i=0;i<N;i++)49
{50
for(j=0;j<N;j++)51
{52
String ar="0";53
if(intarray[i][j]/10<1)54
{55
ar=" "+intarray[i][j];56
}57
else if(intarray[i][j]/100<1 && intarray[i][j]/10>=1)58
{59
ar=" "+intarray[i][j];60
}61
System.out.print(ar+" ");62
}63
System.out.println();64
}65
}66
public static void main(String[] args) throws IOException67
{68
int order=0;69
System.out.println("Please input the order of the square:(<10:)");70
order=System.in.read();71
order=order-'0';72
ArrayPrint arr=new ArrayPrint(order);73
arr.Print();74
}75
}]]>
1public class StringBufferDemo
2{
3 public static void main(String[] args)
4 {
5 StringBuffer sb=new StringBuffer("Java");
6 double d=1.4;
7 sb.append(d).append("have").append(new String(" a lot of new features"));
8 System.out.println(sb);
9 sb.insert(4,"SDK");
10 System.out.println(sb);
11 sb.delete(4,10);
12 System.out.println(sb);
13 System.out.println(sb.reverse());
14 }
15}
public class StringBufferDemo2
{3
public static void main(String[] args)4
{5
StringBuffer sb=new StringBuffer("Java");6
double d=1.4;7
sb.append(d).append("have").append(new String(" a lot of new features"));8
System.out.println(sb);9
sb.insert(4,"SDK");10
System.out.println(sb);11
sb.delete(4,10);12
System.out.println(sb);13
System.out.println(sb.reverse());14
}15
}]]>
1public class StringDemo
2{
3 public static void main(String[] args)
4 {
5 String myName="G. Leeman";
6 int length="娑傞潤闈?/SPAN>".length();
7 System.out.println("闀垮害1錛?/SPAN>"+myName.length());
8 System.out.println("闀垮害2錛?/SPAN>"+length);
9 String name1="programming in java";
10 String name2="Programming in Java";
11 System.out.println("姣旇緝1錛?/SPAN>"+name1.equals(name2));
12 System.out.println("姣旇緝2錛?/SPAN>"+name2.equalsIgnoreCase(name2));
13 System.out.println("姣旇緝3錛?/SPAN>"+name2.compareTo("Progam"));
14 System.out.println("瀛楃1錛?/SPAN>"+name1.charAt(4));
15 System.out.println("瀛楃2錛?/SPAN>"+name1.indexOf('a'));
16 System.out.println("瀛楃3錛?/SPAN>"+name2.lastIndexOf('a'));
17 String subname="in";
18 System.out.println("瀛愪覆1錛?/SPAN>"+name1.substring(3,10));
19 System.out.println("瀛愪覆2錛?/SPAN>"+"abc".concat("123"));
20 System.out.println("瀛愪覆3錛?/SPAN>"+name2.startsWith("Pro"));
21 System.out.println("瀛愪覆4錛?/SPAN>"+name2.endsWith("in Java"));
22 System.out.println("瀛愪覆5錛?/SPAN>"+name1.indexOf(subname));
23 System.out.println("瀛愪覆6錛?/SPAN>"+name1.lastIndexOf(subname));
24 System.out.println("灝忓啓錛?/SPAN>"+name2.toLowerCase());
25 System.out.println("澶у啓錛?/SPAN>"+name2.toUpperCase());
26 System.out.println("鏇挎崲錛?/SPAN>"+name1.replace('a','A'));
27 }
28}
public class StringDemo2
{3
public static void main(String[] args)4
{5
String myName="G. Leeman";6
int length="娑傞潤闈?/SPAN>".length();7
System.out.println("闀垮害1錛?/SPAN>"+myName.length());8
System.out.println("闀垮害2錛?/SPAN>"+length);9
String name1="programming in java";10
String name2="Programming in Java";11
System.out.println("姣旇緝1錛?/SPAN>"+name1.equals(name2));12
System.out.println("姣旇緝2錛?/SPAN>"+name2.equalsIgnoreCase(name2));13
System.out.println("姣旇緝3錛?/SPAN>"+name2.compareTo("Progam"));14
System.out.println("瀛楃1錛?/SPAN>"+name1.charAt(4));15
System.out.println("瀛楃2錛?/SPAN>"+name1.indexOf('a'));16
System.out.println("瀛楃3錛?/SPAN>"+name2.lastIndexOf('a'));17
String subname="in";18
System.out.println("瀛愪覆1錛?/SPAN>"+name1.substring(3,10));19
System.out.println("瀛愪覆2錛?/SPAN>"+"abc".concat("123"));20
System.out.println("瀛愪覆3錛?/SPAN>"+name2.startsWith("Pro"));21
System.out.println("瀛愪覆4錛?/SPAN>"+name2.endsWith("in Java"));22
System.out.println("瀛愪覆5錛?/SPAN>"+name1.indexOf(subname));23
System.out.println("瀛愪覆6錛?/SPAN>"+name1.lastIndexOf(subname));24
System.out.println("灝忓啓錛?/SPAN>"+name2.toLowerCase());25
System.out.println("澶у啓錛?/SPAN>"+name2.toUpperCase());26
System.out.println("鏇挎崲錛?/SPAN>"+name1.replace('a','A'));27
}28
}]]>
浣滆咃細嫻峰瓙
姊ㄨ姳
鍦ㄥ湡澧欎笂婊戝姩
鐗涢搸澹板０
澶у┒鎷夎繃涓や綅灝忓爞寮?BR>绔欏湪鎴戦潰鍓?BR>璞′袱鎴粦鐐?BR>
鏃ュ厜鍏跺疄寰堝己
涓縐嶄竾鐗╃敓闀跨殑闉瓙鍜岃錛?nbsp;
姊ㄨ姳
鍦ㄥ湡澧欎笂婊戝姩
鐗涢搸澹板０
澶у┒鎷夎繃涓や綅灝忓爞寮?BR>绔欏湪鎴戦潰鍓?BR>璞′袱鎴粦鐐?BR>
鏃ュ厜鍏跺疄寰堝己
涓縐嶄竾鐗╃敓闀跨殑闉瓙鍜岃錛?nbsp;
]]>
浣滆咃細嫻峰瓙
鍦ㄩ潚楹﹀湴涓婅窇鐫
闆拰澶槼鐨勫厜鑺?BR>
璇椾漢 浣犳棤鍔涘伩榪?BR>楹﹀湴鍜屽厜鑺掔殑鎯呬箟
涓縐嶆効鏈?BR>涓縐嶅杽鑹?BR>浣犳棤鍔涘伩榪?BR>
浣犳棤鍔涘伩榪?BR>涓棰楁斁灝勫厜鑺掔殑鏄熻景
鍦ㄤ綘澶撮《瀵傚癁鐕冪儳
鍦ㄩ潚楹﹀湴涓婅窇鐫
闆拰澶槼鐨勫厜鑺?BR>
璇椾漢 浣犳棤鍔涘伩榪?BR>楹﹀湴鍜屽厜鑺掔殑鎯呬箟
涓縐嶆効鏈?BR>涓縐嶅杽鑹?BR>浣犳棤鍔涘伩榪?BR>
浣犳棤鍔涘伩榪?BR>涓棰楁斁灝勫厜鑺掔殑鏄熻景
鍦ㄤ綘澶撮《瀵傚癁鐕冪儳
]]>
浣滆咃細嫻峰瓙
楹﹀湴
鍒漢鐪嬭浣?BR>瑙夊緱浣犳俯鏆?nbsp;緹庝附
鎴戝垯绔欏湪浣犵棝鑻﹁川闂殑涓績
琚綘鐏間激
鎴戠珯鍦ㄥお闃?nbsp;鐥涜嫤鐨勮姃涓?BR>
楹﹀湴
紲炵鐨勮川闂呭晩
褰撴垜鐥涜嫤鍦扮珯鍦ㄤ綘鐨勯潰鍓?BR>浣犱笉鑳借鎴戜竴鏃犳墍鏈?BR>浣犱笉鑳借鎴戜袱鎵嬬┖絀?/SPAN>
楹﹀湴
鍒漢鐪嬭浣?BR>瑙夊緱浣犳俯鏆?nbsp;緹庝附
鎴戝垯绔欏湪浣犵棝鑻﹁川闂殑涓績
琚綘鐏間激
鎴戠珯鍦ㄥお闃?nbsp;鐥涜嫤鐨勮姃涓?BR>
楹﹀湴
紲炵鐨勮川闂呭晩
褰撴垜鐥涜嫤鍦扮珯鍦ㄤ綘鐨勯潰鍓?BR>浣犱笉鑳借鎴戜竴鏃犳墍鏈?BR>浣犱笉鑳借鎴戜袱鎵嬬┖絀?/SPAN>
]]>
浣滆咃細嫻峰瓙
浠婂緹庝附鐨勬湀鍏?nbsp;浣犵湅澶氬ソ!
鐓х潃鏈堝厜
楗按鍜岀洂鐨勯┈
鍜屽０闊?BR>
浠婂緹庝附鐨勬湀鍏?nbsp;浣犵湅澶氱編涓?BR>緹婄兢涓?nbsp;鐢熷懡鍜屾浜″畞闈欑殑澹伴煶
鎴戝湪鍊懼惉!
榪欐槸涓鏀ぇ鍦板拰姘寸殑姝岃埃, 鏈堝厜!
涓嶈璇?nbsp;浣犳槸鐏腑涔嬬伅, 鏈堝厜!
涓嶈璇村績涓湁涓涓湴鏂?BR>閭ｆ槸鎴戜竴鐩翠笉鏁㈡ⅵ瑙佺殑鍦版柟
涓嶈闂?nbsp;妗冨瓙瀵規鑺辯殑鐝嶈棌
涓嶈闂?nbsp;鎵撻害澶у湴 澶勫コ 妗傝姳鍜屾潙闀?BR>浠婂緹庝附鐨勬湀鍏?nbsp;浣犵湅澶氬ソ!
涓嶈璇存浜＄殑鐑涘厜浣曢』鍊懼?BR>鐢熷懡渚濈劧鐢熼暱鍦ㄥ咖鎰佺殑娌蟲按涓?BR>鏈堝厜鐓х潃鏈堝厜 鏈堝厜鏅収
浠婂緹庝附鐨勬湀鍏夊悎鍦ㄤ竴璧鋒祦娣?nbsp;
浠婂緹庝附鐨勬湀鍏?nbsp;浣犵湅澶氬ソ!
鐓х潃鏈堝厜
楗按鍜岀洂鐨勯┈
鍜屽０闊?BR>
浠婂緹庝附鐨勬湀鍏?nbsp;浣犵湅澶氱編涓?BR>緹婄兢涓?nbsp;鐢熷懡鍜屾浜″畞闈欑殑澹伴煶
鎴戝湪鍊懼惉!
榪欐槸涓鏀ぇ鍦板拰姘寸殑姝岃埃, 鏈堝厜!
涓嶈璇?nbsp;浣犳槸鐏腑涔嬬伅, 鏈堝厜!
涓嶈璇村績涓湁涓涓湴鏂?BR>閭ｆ槸鎴戜竴鐩翠笉鏁㈡ⅵ瑙佺殑鍦版柟
涓嶈闂?nbsp;妗冨瓙瀵規鑺辯殑鐝嶈棌
涓嶈闂?nbsp;鎵撻害澶у湴 澶勫コ 妗傝姳鍜屾潙闀?BR>浠婂緹庝附鐨勬湀鍏?nbsp;浣犵湅澶氬ソ!
涓嶈璇存浜＄殑鐑涘厜浣曢』鍊懼?BR>鐢熷懡渚濈劧鐢熼暱鍦ㄥ咖鎰佺殑娌蟲按涓?BR>鏈堝厜鐓х潃鏈堝厜 鏈堝厜鏅収
浠婂緹庝附鐨勬湀鍏夊悎鍦ㄤ竴璧鋒祦娣?nbsp;
]]>
浣滆咃細嫻峰瓙
閲庤洰鑰屾偛浼ょ殑嫻峰瓙錛?BR>鐫″湪鍐板喎鑰岀嫮闀跨殑閾佽建涓婏紱
鍠滅埍鍐棩瀵傚癁鏉戝簞鐨勪綘錛?BR>鍊懼績姝諱骸銆?BR>
鍝常鍜屾蹇碉紝鏃╁凡浣滃彜錛?BR>鍚唱鐨勮瘲紼匡紝鍒板椋炶垶錛?BR>婊磋鐨勮瘲鍙ワ紝寮ユ極鍦ㄦ潙钀姐?BR>閲庤洰銆佹偛浼ょ殑嫻峰瓙錛屼笉浼氬媧伙紵
嫻峰瓙鍟婏紒鐜夌背鍜屽皬楹﹀凡鏀惰幏瀹屾瘯錛?BR>姘翠腑鐨勫皯濂充篃鎶婁綘鐨勭櫧楠ㄦ帺鍩嬶紱
鍐滃か鎶婄瀛愬啀嬈℃磼榪涘湡閲岋紝
闀垮嚭鐨勮敩鑿滃拰綺絳変綘閲囨憳
鏄ュぉ錛屽彟涓涓搗瀛愪細澶嶆椿錛岄噹铔?BR>浣嗕笉鎮蹭激
閲庤洰鑰屾偛浼ょ殑嫻峰瓙錛?BR>鐫″湪鍐板喎鑰岀嫮闀跨殑閾佽建涓婏紱
鍠滅埍鍐棩瀵傚癁鏉戝簞鐨勪綘錛?BR>鍊懼績姝諱骸銆?BR>
鍝常鍜屾蹇碉紝鏃╁凡浣滃彜錛?BR>鍚唱鐨勮瘲紼匡紝鍒板椋炶垶錛?BR>婊磋鐨勮瘲鍙ワ紝寮ユ極鍦ㄦ潙钀姐?BR>閲庤洰銆佹偛浼ょ殑嫻峰瓙錛屼笉浼氬媧伙紵
嫻峰瓙鍟婏紒鐜夌背鍜屽皬楹﹀凡鏀惰幏瀹屾瘯錛?BR>姘翠腑鐨勫皯濂充篃鎶婁綘鐨勭櫧楠ㄦ帺鍩嬶紱
鍐滃か鎶婄瀛愬啀嬈℃磼榪涘湡閲岋紝
闀垮嚭鐨勮敩鑿滃拰綺絳変綘閲囨憳
鏄ュぉ錛屽彟涓涓搗瀛愪細澶嶆椿錛岄噹铔?BR>浣嗕笉鎮蹭激
]]>