1\u3001
\n\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6570\u503c\u7c7b\u578b\u7528\uff1a
\n\u6570\u503c\u7c7b\u578b\u5b8c\u6574\u540d.parse + \u7c7b\u578b\u540d(\u5b57\u7b26\u4e32)\u4f8b\u5982\uff1a
\nstring? str = “20”;
\nint num = Integer.parseInt(str);<\/p>\n
2\u3001
\n\u5c06\u57fa\u672c\u7c7b\u578b\u8f6c\u6362\u6210\u5b57\u7b26\u4e32
\n?? string str = string.valueOf(double\/int\/float…);<\/p>\n
3\u3001
\n\u5c06\u5b57\u7b26\u4e32\u5206\u5272\u6210\u6570\u7ec4string []
\nstr = new string[];
\nstr = \u5b57\u7b26\u4e32.split(“\u5206\u5272\u7b26”)<\/p>\n
4\u3001
\n\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u7ec4\u5408\u6210\u5b57\u7b26\u4e32
\n???? (\u6ca1\u6709\u6b64\u65b9\u6cd5)<\/p>\n
5\u3001
\nJava\u4e2d\u7684\u65b9\u6cd5\u540d\u5c0f\u5199,\u7c7b\u540d\u5927\u4e9b,\u4e14\u7c7b\u540d\u548c\u6587\u4ef6\u540d\u76f8\u540c(\u53ca\u548c.java\u6587\u4ef6\u540d\u76f8\u540c)<\/p>\n
6\u3001
\n\u4f7f\u7528\u65b9\u6cd5\u7684\u597d\u5904\uff1a\u65b9\u6cd5\u53ef\u4ee5\u88ab\u53cd\u590d\u7684\u8c03\u7528\uff0c\u4ece\u800c\u4f7f\u4ee3\u7801\u53d8\u5f97\u7b80\u6d01\uff0c\u5982\u679c\u65b9\u6cd5\u5e26\u53c2\u6570\u5219\u65b9\u6cd5\u53d8\u5f97\u66f4\u52a0\u7075\u6d3b\u3002<\/p>\n
7\u3001
\n\u5982\u679c\u60f3\u6253\u5370\u51fa\u5f15\u53f7(“)\u5219\u9700\u8981\u5c06\u5f15\u53f7\u5199\u6210(\\”)\u5f62\u5f0f\u3002(\\\u8f6c\u4e49\u5de5\u5177\uff0c\u4e5f\u8bb8\u53ef\u4ee5\u8fd9\u4e48\u8bf4\u5427)<\/p>\n
8\u3001
\n\\n \u662f\u6362\u884c\uff0c\\t\u662f8\u4e2a\u7a7a\u683c\u4e0d\u6362\u884c\u3002<\/p>\n
9\u3001(\u6b63\u5219\u8fd0\u7b97)
\nString geCi = “\u8fd9\u4e9b\u5e74\u4e00\u4e2a\u4eba\uff0c\u98ce\u4e5f\u8fc7\uff0c\u96e8\u4e5f\u8fc7\uff0c\u6709\u8fc7\u6cea\uff0c\u6709\u8fc7\u9519\uff0c\u8fd8\u8bb0\u5f97\u575a\u6301\u4ec0\u4e48\uff0c\u771f\u7231\u8fc7\u624d\u4f1a\u61c2\uff0c\u4f1a\u5bc2\u5bde\u4f1a\u56de\u9996\uff0c\u7ec8\u6709\u68a6\u7ec8\u6709\u4f60\u5728\u5fc3\u4e2d\u3002\u670b\u53cb\u4e00\u751f\u4e00\u8d77\u8d70\uff0c\u90a3\u4e9b\u65e5\u5b50\u4e0d\u518d\u6709\uff0c\u4e00\u53e5\u8bdd\uff0c\u4e00\u8f88\u5b50\uff0c\u4e00\u751f\u60c5\uff0c\u4e00\u676f\u9152\u3002\u670b\u53cb\u4e0d\u66fe\u5b64\u5355\u8fc7\uff0c\u4e00\u58f0\u670b\u53cb\u4f60\u4f1a\u61c2\uff0c\u8fd8\u6709\u4f24\uff0c\u8fd8\u8981\u8d70\uff0c\u8fd8\u6709\u6211\u3002”;
\n??int i = 0;
\n??int j= 0;
\n??String b = “\u670b\u53cb”;
\n??for(i=0;i<geCi.length();i++){
\n???if(b.regionMatches(0, geCi, i, 2)){
\n????j++;
\n???}
\n??}
\n??System.out.println(“\\”\u670b\u53cb\\”\u5171\u51fa\u73b0” + j + “\u6b21”);<\/p>\n
?}
\n10\u3001
\n(int)char\u65b9\u6cd5\u53ef\u4ee5\u5c06char\u7c7b\u578b\u7684\u53d8\u91cf\u8f6c\u53d8\u6210int\u7c7b\u578b(\u53ca\u5c06\u6c49\u5b57\u8f6c\u6362\u6210\u5176\u5728\u8ba1\u7b97\u673a\u4e2d\u76f8\u5e94\u7684\u5185\u7801\uff0c\u6574\u578b\uff0c\u5c06\u5c0f\u5199\u5b57\u6bcd\u8f6c\u6362\u6210\u5927\u5199\u5b57\u6bcd\u7684\u7684\u65b9\u6cd5\u662f\uff1a(char)((int)\u5b57\u6bcd – 32))
\n\u5728\u5982\u4e0b\u65b9\u6cd5\u4e2d\u662f\u6b63\u786e\u7684\uff0c\u5982\u679c\u662fdouble\u7c7b\u578b\u7684\u5219\u4e0d\u53ef\u4ee5
\npublic? int count(char c,int i)
\n?return c*i;
\n?(\u91cd\u8981)
\n11\u3001
\nstr1.equals(str2)\u65b9\u6cd5\u53ef\u4ee5\u6bd4\u8f83\u5982\u4e0b\u7684string\u7c7b\u578b\u7684\u5b57\u7b26\u4e32
\nString str1 = new String(“str”);
\nString str2 = new String(“str”);
\nSystem.out.println(str1.equals(str2));
\n\u8f93\u51fa\u7684\u503c\u4e3atrue;<\/p>\n
String str1 = “str”;
\nString str2 = new String(“str”);
\nSystem.out.println(str1.equals(str2));
\n\u8f93\u51fa\u7684\u503c\u4e3atrue;<\/p>\n
String str1 = “str”;
\nString str2 = “str”;
\nSystem.out.println(str1.equals(str2));
\n\u8f93\u51fa\u7684\u503c\u4e3atrue;<\/p>\n
“==”\u53ea\u80fd\u7528\u4e0e\u4e00\u4e0b\u7684\u4ee5\u4e2d\u5f62\u5f0f\uff1a
\nString str1 = “str”;
\nString str2 = “Str”;
\nSystem.out.println(str1==str2);
\n\u8f93\u51fa\u7684\u503c\u4e3atrue;<\/p>\n
12\u3001
\nint i =1;
\ni++;
\n(1)System.out.println(i);
\n\u7ed3\u679c\u4e3a\uff1a2
\n\u82e5\uff1a
\n(1)System.out.println(i++);
\n(2)System.out.println(++i);
\n\u7ed3\u679c\u4e3a\uff1a(1)1 \u548c (2)2<\/p>\n
13\u3001
\n\u4ea7\u751f\u968f\u673a\u6570\u7684\u65b9\u6cd5\u662f (Math.Random())\u6240\u4ea7\u751f\u7684\u968f\u673a\u6570\u5728[0-1)\u4e4b\u95f4<\/p>\n
14\u3001
\npublic static void main(String[] args) {
\n??\/\/ TODO \u81ea\u52a8\u751f\u6210\u65b9\u6cd5\u5b58\u6839
\n??
\n??StringBuffer name = new StringBuffer(“YangYang”);
\n??StringBuffer nickName = new StringBuffer(“YaYa”);
\n??D d = new D();
\n??d.changeName(name,nickName);
\n??System.out.print(“? “+name);
\n??System.out.println(“? ” + nickName);
\n??
\n??
\n?}
\n?public void changeName(StringBuffer name,StringBuffer nickName) ?{
\n??name = new StringBuffer(“Yangfan”);
\n??nickName.append(“1”);
\n??System.out.print(“? “+name);
\n??System.out.println(“? ” + nickName);
\n?}
\n\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a Yangfan? YaYa1? YangYang? YaYa1<\/p>\n
25\uff09?\u4f7f\u7528C#\u5f00\u53d1\u63a7\u5236\u53f0\u5e94\u7528\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u5982\u679c\u9700\u8981\u7a0b\u5e8f\u63a5\u6536\u7528\u6237\u8f93\u5165\u7684\u6574\u578b\u6570\u5b57\uff0c\u5219\u5e94\u5f53\u4f7f\u7528\u4ee5\u4e0b\uff08D\uff09\u8bedfsdfsdf\u53e5\u5b9e\u73b0\u3002\uff08\u9009\u62e9\u4e00\u9879\uff09
\nA\u3001?int I = Console.ReadLine().int();? B\u3001int I = int(Console.ReadLine());
\nC\u3001int I = Console.ReadLine();?? D\u3001int I = int.Parse(Console.ReadLine());<\/p>\n
32\uff09?\u5728C#\u4e2d\uff0c\u4e0b\u5217\u4ee3\u7801\u7684\u8fd0\u884c\u7ed3\u679c\u662f\uff08d\uff09
\nUsing System;
\nNamespace TestApplication
\n{?Public class Test
\n?{Static void Main()
\n??{?? int x = 6;
\n???switch(x){
\ncase 6:
\ncase7:
\n?Console.WriteLine(\u201c\u4eca\u5929\u662f\u5468\u672b\u201d);
\n?Break;
\nCase 1:
\n?Console.WriteLine(\u201c\u4eca\u5929\u662f\u661f\u671f\u4e00\u201d);
\n?Break;
\nCase 2:
\n?Console.WriteLine(\u201c\u4eca\u5929\u662f\u661f\u671f\u4e8c\u201d);
\n?Break;
\nDefault:
\n?Console.WriteLine(\u201c\u4f60\u5b8c\u6210\u4efb\u52a1\u4e86\u5417\uff1f\u201d);
\n?Break;
\n}
\n}
\n}
\n}
\nA\u3001?\u7f16\u8bd1\u9519\u8bef????????? B\u3001\u8f93\u51fa\uff1a\u4eca\u5929\u661f\u671f\u4e00?
\nC\u3001\u8f93\u51fa\uff1a\u4eca\u5929\u661f\u671f\u4e8c?? D\u3001\u8f93\u51fa\u4eca\u5929\u662f\u5468\u672b
\n39\uff09?\u7ed9\u5b9a\u5982\u4e0bJava\u4ee3\u7801\u7247\u6bb5\uff0c\u7f16\u8bd1\u8fd0\u884c\u65f6\u7684\u7ed3\u679c\u662f\uff08D\uff09\uff08\u9009\u62e9\u4e00\u9879\uff09
\nInt i = 2;
\nSwitch (i) {
\n?Default:
\n?System.out.println (\u201cdefault\u201d);
\nCase 0:
\nSystem.out.println (\u201cZero\u201d);
\n?Break;
\nCase 1:
\n?System.out.println (\u201cone\u201d);
\n?Break;
\nCase 2:
\n?System.out.println (\u201ctwo\u201d);
\n?Break;
\n}
\nA\u3001?\u8f93\u51fa\uff1adefault
\nB\u3001?\u8f93\u51fa\uff1adefault
\nZero
\nC\u3001?\u7f16\u8bd1\u51fa\u9519\uff0cdefault\u8bed\u53e5\u7684\u4f4d\u7f6e\u4e0d\u7b26\u5408switch\u7ed3\u6784\u7684\u8bed\u6cd5\u7ed3\u6784
\nD\u3001?\u8f93\u51fa\uff1atwo<\/p>\n
41) \u5728Java\u4e2d\uff0c\u4e0b\u9762\uff08AB\uff09\u8bed\u53e5\u80fd\u591f\u6b63\u786e\u901a\u8fc7\u7f16\u8bd1\u3002\uff08\u9009\u62e9\u4e24\u9879\uff09
\n?A\u3001System.out.println (1+1);
\n?B\u3001char i= 2+\u20192\u2019;
\n??System.out.println (i);
\n?C\u3001String s = \u201con\u201d+\u2019one\u2019; ?D\u3001int b = 255.0;<\/p>\n
44\uff09 \u5206\u6790\u4e0b\u9762\u7684HTML\u4ee3\u7801\u7247\u6bb5\uff0c\u5219\u9009\u9879\u4e2d\u8bf4\u6cd5\u6b63\u786e\u7684\u662f\uff08AD\uff09\uff08\u9009\u62e9\u4e24\u9879\uff09
\n?<table cellspcaing=\u201d30\u201d>
\n?<tr><td colspan=\u201d2\u201d align=\u201dcenter\u201d>\u59d3\u540d<\/td><\/tr>
\n?<tr><td colspan=\u201d2\u201d align=\u201dcenter\u201d>\u6210\u7ee9<\/td><\/tr>
\n?<tr><td colspan=\u201d2\u201d align=\u201dcenter\u201d>\u8bed\u6587<\/td><\/tr>
\n?<tr><td colspan=\u201d2\u201d algin=\u201dcenter>\u6570\u5b66<\/td><\/tr>
\n?<\/table>
\n?\u8be5\u8868\u683c\u5171\u6709\u4e24\u884c\u4e09\u5217?????? B\u3001\u8be5\u8868\u683c\u7684\u8fb9\u6846\u5bbd\u5ea6\u4e3a30\u50cf\u7d20
\nA\u3001?\u8be5\u8868\u683c\u4e2d\u7684\u6587\u5b57\u5747A\u5c45\u4e2d\u663e\u793a? D\u3001\u201c\u59d3\u540d\u201d\u5355\u5143\u683c\u8de82\u5217
\n45\uff09 \u5728SQL Server 2005\u6570\u636e\u5e93\u4e2d\uff0c\u5ba2\u6237\u8868customers\u5305\u542b\u5b57\u6bb5\uff1a\u5ba2\u6237\u7f16\u53f7cid\u548c\u540d\u79f0cname,\u8ba2\u5355\u8868orders\u5305\u542b\u5b57\u6bb5\uff1a\u5ba2\u6237\u7f16\u53f7cid\uff0c\u5982\u679c\u9700\u8981\u901a\u8fc7\u67e5\u8be2\u6216\u5f97\u8ba2\u5355\u7684\u5ba2\u6237\u540d\u79f0\uff0c\u4e0b\u9762\u67e5\u8be2\u8bed\u53e5\u4e2d(B)\u53ef\u4ee5\u5b9e\u73b0\u8be5\u9700\u6c42\uff08\u9009\u62e9\u4e00\u9879\uff09
\n?A\u3001 select customers.cname from customers left join orders on customers.cid = orders.cid
\n?B\u3001 select customers.cname from customers inner join orders on customers.cid = orders.cid
\n?C\u3001select cusomers.cname from customers right join orders where customers.cid = orders.cid
\n?D\u3001select customers.cname from customers join orders where customers.cid = orders.cid<\/p>\n
47\uff09\u5206\u6790\u4e0b\u9762\u7684Java\u7a0b\u5e8f\uff0c\u7f16\u8bd1\u8fd0\u884c\u7ed3\u679c\u662f\uff08A\uff09\uff08\u9009\u62e9\u4e00\u9879\uff09
\n?Public class B{
\n??Public static void main (String [] args) {
\n???String s = \u201cy\u201d;
\n???System.out.println(s+1+2);
\n???System.out.println (1+2+s);
\n}
\n}
\nA\u3001?\u8f93\u51fa\uff1ay12
\n3y
\nB\u3001?\u8f93\u51fa\uff1ay12
\n12y
\nC\u3001?\u8f93\u51fa\uff1ay3
\n3y
\nD\u3001?\u7a0b\u5e8f\u7f16\u8bd1\u51fa\u9519
\n\u6ce8\uff1aString \u7c7b\u7684\u65b9\u6cd5\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u64cd\u4f5c\uff0c\u6ca1\u6539\u53d8\u4e00\u6b21\u503c\uff0c\u5c31\u91cd\u65b0\u5f00\u8f9f\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\u6765\u5b58\u50a8
\n??? StringBuffer \u7c7b\u7684\u65b9\u6cd5\u662f\u5bf9\u5185\u5b58\u4e2d\u7684\u503c\u8fdb\u884c\u5904\u7406(\u5728\u540c\u4e00\u5757\u5185\u5b58\u7a7a\u95f4\u8fdb\u884c\u53cd\u590d\u7684\u64cd\u4f5c\uff0c\u6ca1\u6709\u91cd\u65b0\u5f00\u8f9f\u5185\u5b58\u7a7a\u95f4)
\n??? (StringBuffer\u7684\u65b9\u6cd5\u5bf9\u5b57\u7b26\u4e32\u7684\u5904\u7406\u6bd4String\u7684\u65b9\u6cd5\u5bf9\u5b57\u7b26\u4e32\u7684\u5904\u7406\u7684\u6548\u7387\u9ad8\u3002String \u53ef\u4ee5\u4e0d\u7528new\u5173\u952e\u5b57\u521b\u5efa\u5bf9\u8c61\uff0c\u5b83\u4f1a\u81ea\u52a8\u7684\u9690\u5f0f\u521b \u5efa,String- Buffer\u5fc5\u987b\u7528new\u5173\u952e\u5b57)<\/p>\n
? \u4f8b\u5982\uff1a
\n??? string str = “\u6211”;
\n??? str.concat(“\u4eec”);????? \/\/\u64cd\u4f5c\u7684\u4ec5\u662f\u526f\u672c\uff0c\u5e76\u6ca1\u5c06\u503c\u590d\u5236\u7ed9str
\n??? syso(str);
\n??? \u7ed3\u679c\u4e3a\uff1a\u6211,\u800c\u5e76\u975e,\u6211\u4eec;
\n??? \u800c
\n??? StringBuffer sb = new StringBuffer(“\u6211”);
\n??? sb.compend(“\u4eec”);????? \/\/\u76f4\u63a5\u4fee\u6539\u5185\u5b58\u4e2d\u7684\u503c
\n??? syso(sb);
\n??? \u7ed3\u679c\u4e3a\uff1a\u6211\u4eec,\u800c\u5e76\u975e,\u6211;<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u3001 \u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6570\u503c\u7c7b\u578b\u7528\uff1a \u6570\u503c\u7c7b\u578b\u5b8c\u6574\u540d.parse + \u7c7b\u578b\u540d(\u5b57\u7b26\u4e32)\u4f8b\u5982\uff1a string? str […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-820","post","type-post","status-publish","format-standard","hentry","category-java"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/820","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=820"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/820\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}