minor improvements on java client based on intellji ide (#13864)

Author: wing328

modules/openapi-generator/src/main/resources/Java/ServerConfiguration.mustache

@@ -42,7 +42,7 @@ public class ServerConfiguration {
                     throw new IllegalArgumentException("The variable " + name + " in the server URL has invalid value " + value + ".");
                 }
             }
-            url = url.replaceAll("\\{" + name + "\\}", value);
+            url = url.replace("{" + name + "}", value);
         }
         return url;
     }

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache

@@ -751,7 +751,7 @@ public class ApiClient {
                 if (b.length() > 0) {
                     b.append(",");
                 }
-                b.append(String.valueOf(o));
+                b.append(o);
             }
             return b.toString();
         } else {
@@ -1659,7 +1659,7 @@ public class ApiClient {
                     KeyStore caKeyStore = newEmptyKeyStore(password);
                     int index = 0;
                     for (Certificate certificate : certificates) {
-                        String certificateAlias = "ca" + Integer.toString(index++);
+                        String certificateAlias = "ca" + (index++);
                         caKeyStore.setCertificateEntry(certificateAlias, certificate);
                     }
                     trustManagerFactory.init(caKeyStore);

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache

@@ -69,7 +69,7 @@ if(hasProperty('target') && target == 'android') {
             task.from variant.javaCompile.destinationDir
             task.destinationDir = project.file("${project.buildDir}/outputs/jar")
             task.archiveName = "${project.name}-${variant.baseName}-${version}.jar"
-            artifacts.add('archives', task);
+            artifacts.add('archives', task)
         }
     }
 

samples/client/others/java/okhttp-gson-streaming/build.gradle

@@ -65,7 +65,7 @@ if(hasProperty('target') && target == 'android') {
             task.from variant.javaCompile.destinationDir
             task.destinationDir = project.file("${project.buildDir}/outputs/jar")
             task.archiveName = "${project.name}-${variant.baseName}-${version}.jar"
-            artifacts.add('archives', task);
+            artifacts.add('archives', task)
         }
     }
 

samples/client/others/java/okhttp-gson-streaming/src/main/java/org/openapitools/client/ApiClient.java

@@ -591,7 +591,7 @@ public String parameterToString(Object param) {
                 if (b.length() > 0) {
                     b.append(",");
                 }
-                b.append(String.valueOf(o));
+                b.append(o);
             }
             return b.toString();
         } else {
@@ -1456,7 +1456,7 @@ public boolean verify(String hostname, SSLSession session) {
                     KeyStore caKeyStore = newEmptyKeyStore(password);
                     int index = 0;
                     for (Certificate certificate : certificates) {
-                        String certificateAlias = "ca" + Integer.toString(index++);
+                        String certificateAlias = "ca" + (index++);
                         caKeyStore.setCertificateEntry(certificateAlias, certificate);
                     }
                     trustManagerFactory.init(caKeyStore);

samples/client/others/java/okhttp-gson-streaming/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -42,7 +42,7 @@ public String URL(Map<String, String> variables) {
                     throw new IllegalArgumentException("The variable " + name + " in the server URL has invalid value " + value + ".");
                 }
             }
-            url = url.replaceAll("\\{" + name + "\\}", value);
+            url = url.replace("{" + name + "}", value);
         }
         return url;
     }

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -42,7 +42,7 @@ public String URL(Map<String, String> variables) {
                     throw new IllegalArgumentException("The variable " + name + " in the server URL has invalid value " + value + ".");
                 }
             }
-            url = url.replaceAll("\\{" + name + "\\}", value);
+            url = url.replace("{" + name + "}", value);
         }
         return url;
     }

samples/client/petstore/java/feign-no-nullable/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -42,7 +42,7 @@ public String URL(Map<String, String> variables) {
                     throw new IllegalArgumentException("The variable " + name + " in the server URL has invalid value " + value + ".");
                 }
             }
-            url = url.replaceAll("\\{" + name + "\\}", value);
+            url = url.replace("{" + name + "}", value);
         }
         return url;
     }

samples/client/petstore/java/feign/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -42,7 +42,7 @@ public String URL(Map<String, String> variables) {
                     throw new IllegalArgumentException("The variable " + name + " in the server URL has invalid value " + value + ".");
                 }
             }
-            url = url.replaceAll("\\{" + name + "\\}", value);
+            url = url.replace("{" + name + "}", value);
         }
         return url;
     }

samples/client/petstore/java/google-api-client/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -42,7 +42,7 @@ public String URL(Map<String, String> variables) {
                     throw new IllegalArgumentException("The variable " + name + " in the server URL has invalid value " + value + ".");
                 }
             }
-            url = url.replaceAll("\\{" + name + "\\}", value);
+            url = url.replace("{" + name + "}", value);
         }
         return url;
     }