{"id":1657,"date":"2020-08-04T10:05:20","date_gmt":"2020-08-04T02:05:20","guid":{"rendered":"http:\/\/admin.evshou.com\/?p=1657"},"modified":"2020-08-07T16:04:03","modified_gmt":"2020-08-07T08:04:03","slug":"2020java%e6%95%99%e7%a8%8b%ef%bc%9a%e5%a4%9a%e7%ba%a7%e8%b0%83%e7%94%a8%e4%bb%a5%e5%8f%8a%e9%80%92%e5%bd%92%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=1657","title":{"rendered":"2020java\u6559\u7a0b\uff1a\u591a\u7ea7\u8c03\u7528\u4ee5\u53ca\u9012\u5f52\u7684\u4f7f\u7528"},"content":{"rendered":"

2020java\u6559\u7a0b\uff1a\u591a\u7ea7\u8c03\u7528\u4ee5\u53ca\u9012\u5f52\u7684\u4f7f\u7528<\/h2>\n

\u591a\u7ea7\u8c03\u7528<\/p>\n

public class demo{
\npublic static void main(String[] args){
\nm1();
\n}
\npublic static void m1(){
\nSystem.out.println(“m1() -start”);
\nm2();
\nSystem.out.println(“m1() -end”);
\n}
\npublic static void m2(){
\nSystem.out.println(“m2() -start”);
\nSystem.out.println(“m2() -end”);
\n}
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\nm1()-start
\nm2()-start
\nm2()-end
\nm1()-end<\/p>\n

\u4f18\u5148\u6267\u884c\u51fd\u6570\u5185\u90e8\u4ee3\u7801\uff0c\u7ed3\u675f\u540e\uff0c\u8fd4\u56de\u5230\u8c03\u7528\u5904\uff0c\u7ee7\u7eed\u5411\u4e0b\u6267\u884c<\/p>\n

\u65e0\u7a77\u9012\u5f52<\/h3>\n

public class demo{
\npublic static void main(String[] args){
\nm1();
\n}
\npublic static void m1(){
\nSystem.out.println(“m1() -start”);
\nm1();\/\/\u5f53\u51fd\u6570\u81ea\u5df1\u8c03\u7528\u81ea\u5df1\u65f6\uff0c\u5982\u679c\u6ca1\u6709\u6b63\u786e\u7684\u51fa\u53e3\u6761\u4ef6\uff0c
\n\u5219\u4f1a\u4ea7\u751f\u65e0\u7a77\u9012\u5f52
\nSystem.out.println(“m1() -end”);
\n}
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\nm1()-start
\nm1()-start
\nm1()-start
\nm1()-start
\n……<\/p>\n

Exception in thread “main” java.lang.StackOverflowError \u5185\u5b58\u6ea2\u51fa<\/p>\n

\u9012\u5f52<\/h3>\n

\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u9012\u5f52\u53ef\u4ee5\u89e3\u51b3\u5177\u6709\u65e2\u5b9a\u89c4\u5f8b\u7684\u7279\u5b9a\u95ee\u9898<\/p>\n

\u4f55\u65f6\u4f7f\u7528\u9012\u5f52\uff1f
\n\u5f53\u9700\u8981\u89e3\u51b3\u7684\u95ee\u9898\u53ef\u4ee5\u62c6\u5206\u6210\u82e5\u5e72\u4e2a\u5c0f\u95ee\u9898\uff0c\u5927\u5c0f\u95ee\u9898\u7684\u89e3\u51b3\u65b9\u6cd5\u76f8\u540c
\n\u6709\u56fa\u5b9a\u89c4\u5f8b\uff0c\u51fd\u6570\u4e2d\u81ea\u5df1\u8c03\u7528\u81ea\u5df1<\/p>\n

\u5982\u4f55\u6b63\u786e\u4f7f\u7528\u9012\u5f52\uff1f
\n\u8bbe\u7f6e\u6709\u6548\u51fa\u53e3\u6761\u4ef6\uff0c\u907f\u514d\u65e0\u7a77\u9012\u5f52<\/p>\n

\u5faa\u73af\u9636\u4e58<\/p>\n

– \u8ba1\u7b975\u7684\u9636\u4e58\uff1a`5!=5*4*3*2*1;`<\/p>\n

public class demo{
\npublic static void main(String[] args){
\nSystem.out.println(jiecheng(5));
\n}
\npublic static int jiecheng(int n){
\nint sum=1;
\nfor(int i=2;i<=n;i++){
\nsum*=i;
\n}
\nreturn sum;
\n}
\n\/*
\n\u5faa\u73af\u8ba1\u7b97\u9636\u4e58\u8f83\u4e3a\u7b80\u5355\uff0c\u4f9d\u6b21\u4e0e\u6bcf\u4e2a\u503c\u76f8\u4e58\u5373\u53ef
\n*\/
\n}<\/p>\n

\u9012\u5f52\u9636\u4e58
\n\u9636\u4e58\u7684\u5b9a\u4e49\uff1a `n!=n*(n-1)*(n-2)*(n-3)…`<\/p>\n

1!=1;\/\/1\u7684\u9636\u4e58\u5c31\u662f1
\n2!=2*1;\/\/2\u7684\u9636\u4e58\u662f2
\n3!=3*2;\/\/3\u7684\u9636\u4e58\u662f6
\n4!=4*3;\/\/4\u7684\u9636\u4e58\u662f24
\n5!=5*4;\/\/3\u7684\u9636\u4e58\u662f120<\/p>\n

– \u56de\u5f52\uff1a\u57fa\u4e8e\u51fa\u53e3\u7684\u7ed3\u679c\uff0c\u9010\u5c42\u5411\u4e0a\u56de\u5f52\uff0c\u4f9d\u6b21\u8ba1\u7b97\u6bcf\u4e00\u5c42\u7684\u7ed3\u679c\uff0c\u76f4\u81f3\u56de\u5f52\u5230\u6700\u9876\u5c42
\n– \u9012\u8fdb\uff1a\u6bcf\u4e00\u6b21\u63a8\u8fdb\uff0c\u8ba1\u7b97\u90fd\u6bd4\u4e0a\u4e00\u6b21\u53d8\u5f97\u7b80\u5355\uff0c\u76f4\u81f3\u7b80\u5355\u5230\u65e0\u9700\u7ee7\u7eed\u63a8\u8fdb\uff0c\u5c31\u80fd\u83b7\u5f97\u7ed3\u679c\u3002\u4e5f\u53eb\u5230\u8fbe\u51fa\u53e3<\/p>\n

\u9012\u5f52\u7684\u9519\u8bef\u6f14\u793a<\/p>\n

public class demo{
\npublic static void main(String[] args){
\nSystem.out.println(jiecheng(1));
\n}
\npublic static int jiecheng(int n){
\nretrun n*jiecheng(n-1)
\n}
\n}
\n\u5f53n=1\u65f6\uff0c\u5e76\u6ca1\u6709\u8ba1\u7b97\u51fa1!=1
\n\u800c\u662f\u7ee7\u7eed\u9012\u8fdb\uff0c\u8ba1\u7b971!=1*0!\uff0c
\n\u6240\u4ee5\u5bfc\u81f4\u6c38\u8fdc\u6ca1\u6709\u51fa\u53e3\u6761\u4ef6\uff0c
\n\u5219\u9020\u6210\u65e0\u7a77\u9012\u5f52\uff0c\u5185\u5b58\u6ea2\u51fa\uff01
\nException in thread “main” java.lang.StackOverflowError<\/p>\n

\u9012\u5f52\u7684\u6b63\u786e\u6f14\u793a<\/p>\n

public class demo{
\npublic static void main(String[] args){
\nSystem.out.println(jiecheng(5));
\n}
\npublic static int jiecheng(int n){
\nif(n==1){
\nreturn 1;
\n}
\nretrun n*jiecheng(n-1);
\n}
\n}<\/p>\n

– \u6ce8\u610f\uff1a\u6240\u6709\u80fd\u4ee5\u9012\u5f52\u89e3\u51b3\u7684\u95ee\u9898\uff0c\u5faa\u73af\u4e5f\u80fd\u89e3\u51b3\u3002
\n– \u5f53\u89e3\u51b3\u590d\u6742\u95ee\u9898\u65f6\uff0c\u9012\u5f52\u7684\u5b9e\u73b0\u65b9\u5f0f\u66f4\u4e3a\u7b80\u5355\u3002<\/p>\n

 <\/p>\n

\u9012\u5f52\u5b8c\u6210\u6590\u6ce2\u90a3\u5951\u6570\u5217<\/h3>\n

public class demo{
\npublic static void main(String[] args){
\nint c=jc(8);
\nSystem.out.println(c);
\n}
\npublic static int jc(int n){
\nif(n==0){
\nreturn 0;
\n}else if(n==1){
\nreturn 1;
\n}
\nreturn jc(n-1)+jc(n-2);
\n}
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

2020java\u6559\u7a0b\uff1a\u591a\u7ea7\u8c03\u7528\u4ee5\u53ca\u9012\u5f52\u7684\u4f7f\u7528 \u591a\u7ea7\u8c03\u7528 public class demo{ public s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-1657","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/1657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1657"}],"version-history":[{"count":4,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/1657\/revisions"}],"predecessor-version":[{"id":1791,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/1657\/revisions\/1791"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}