Question

这是发生在我身上的新事物。我为我的阿姨做了一个非常简单的计算器，由于某种原因主要的方法不能与JFrame连接。

第1行和第5行有错误的主要代码都说类接口或枚举。

public static void main(String args[]) {
   Interface i = new Interface();
   i.setVisible(true); 
}

第二个代码（Jframe）我删除了样式以及下面的所有内容，因为它是在netbeans中自动生成的。

package kalkulator;
public class Interface extends javax.swing.JFrame {
String vse; 
String procenti;
double pro = Double.parseDouble(procenti);
double cel = Double.parseDouble(vse);

public Interface() {
    this.vse= celota.getText();
    this.procenti = procent.getText();
}
String rezult = String.valueOf(cel*pro);

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt){                                         
   rezultat.setText(rezult);
}                                        

/**
 * @param args the command line arguments
 */
// Variables declaration - do not modify                     
private javax.swing.JTextField celota;
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JTextField procent;
private javax.swing.JTextField rezultat;
// End of variables declaration                   
}

第二个代码（JFrame）显示没有错误。两者都在同一文件夹Error screen中。我已经很长时间没有编码，所以这可能只是一个非常愚蠢的错误。

Answer 1

您的/********* Sample code generated by the curl command line tool ********** * All curl_easy_setopt() options are documented at: * https://curl.haxx.se/libcurl/c/curl_easy_setopt.html ************************************************************************/ #include <curl/curl.h> int main(int argc, char *argv[]) { CURLcode ret; CURL *hnd; struct curl_slist *slist1; slist1 = NULL; slist1 = curl_slist_append(slist1, "depth:1"); hnd = curl_easy_init(); curl_easy_setopt(hnd, CURLOPT_URL, "https://www.url.fr/to/webdav/number/folder/"); curl_easy_setopt(hnd, CURLOPT_NOPROGRESS, 1L); curl_easy_setopt(hnd, CURLOPT_PROXY, "http://proxyurl:80"); curl_easy_setopt(hnd, CURLOPT_PROXYUSERPWD, ":"); curl_easy_setopt(hnd, CURLOPT_PROXYAUTH, (long)CURLAUTH_NTLM); curl_easy_setopt(hnd, CURLOPT_USERAGENT, "curl/7.52.1"); curl_easy_setopt(hnd, CURLOPT_HTTPHEADER, slist1); curl_easy_setopt(hnd, CURLOPT_MAXREDIRS, 50L); curl_easy_setopt(hnd, CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_2TLS); curl_easy_setopt(hnd, CURLOPT_KEYPASSWD, "tempcertificat.pem:certifPassword"); curl_easy_setopt(hnd, CURLOPT_SSLCERT, "C"); curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L); curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L); curl_easy_setopt(hnd, CURLOPT_CUSTOMREQUEST, "PROPFIND"); curl_easy_setopt(hnd, CURLOPT_TCP_KEEPALIVE, 1L); /* Here is a list of options the curl code used that cannot get generated as source easily. You may select to either not use them or implement them yourself. CURLOPT_WRITEDATA set to a objectpointer CURLOPT_INTERLEAVEDATA set to a objectpointer CURLOPT_WRITEFUNCTION set to a functionpointer CURLOPT_READDATA set to a objectpointer CURLOPT_READFUNCTION set to a functionpointer CURLOPT_SEEKDATA set to a objectpointer CURLOPT_SEEKFUNCTION set to a functionpointer CURLOPT_ERRORBUFFER set to a objectpointer CURLOPT_STDERR set to a objectpointer CURLOPT_HEADERFUNCTION set to a functionpointer CURLOPT_HEADERDATA set to a objectpointer */ ret = curl_easy_perform(hnd); curl_easy_cleanup(hnd); hnd = NULL; curl_slist_free_all(slist1); slist1 = NULL; return (int)ret; } /**** End of sample code ****/方法需要一个班级才能入住。

首先，类应该以大写字母开头，因此应该定义它们的main文件名。因此，将.java重命名为kalkulator.java并添加类定义围绕它：

Kalkulator.java

JFrame不会出现。主要方法不起作用

1 个答案: