fix(java): simplify NodeID name to methodName(paramTypes) (#189)

* fix(java): simplify NodeID name to methodName(paramTypes)

Java method NodeIDs were using the JAR-provided Descriptor/RawText
directly, which often included modifiers, return type, throws clause,
parameter names and annotations. Rebuild the name from MethodDetail's
parameter list (TypeRawText, falling back to TypeFqcn) so NodeIDs are
stable and concise — e.g. queryJwtToken(String,String,String).

* fix(java): strip modifiers/return type from method NodeID

GetName() only splits Descriptor at '(' so when the JAR returns the
long form (e.g. "abstract void foo()"), modifiers and return type
leaked into the NodeID name. Take the last whitespace-delimited token
after GetName(), and drop empty parens for no-arg methods so the
exported "Class.method" form stays clean.

Author: wzekin

lang/collect/collect.go

@@ -830,10 +830,7 @@ func (c *Collector) ScannerByJavaIPC(ctx context.Context) ([]*DocumentSymbol, er
 			if m == nil {
 				continue
 			}
-			name := m.Descriptor
-			if name == "" {
-				name = m.GetName()
-			}
+			name := buildJavaMethodID(m)
 			if name == "" {
 				continue
 			}
@@ -2524,6 +2521,45 @@ func (c *Collector) extractRootIdentifier(node *sitter.Node, content []byte) str
 	return ""
 }
 
+// buildJavaMethodID generates the simplified NodeID.Name for a Java method:
+//   methodName(ParamRawType1,ParamRawType2,...)
+// Strips access modifiers, static/final/etc., annotations, return type, throws,
+// and parameter names. Prefers ParameterDetail.TypeRawText (preserves generics
+// and array notation as written) and falls back to TypeFqcn.
+func buildJavaMethodID(m *javapb.MethodDetail) string {
+	if m == nil {
+		return ""
+	}
+	name := strings.TrimSpace(m.GetName())
+	// GetName() may still contain modifiers + return type when the JAR's
+	// Descriptor uses the long form (e.g. "abstract void foo"). Take the last
+	// token after any space.
+	if sp := strings.LastIndexByte(name, ' '); sp >= 0 {
+		name = name[sp+1:]
+	}
+	if name == "" {
+		return ""
+	}
+	types := make([]string, 0, len(m.Parameters))
+	for _, p := range m.Parameters {
+		if p == nil {
+			continue
+		}
+		t := p.TypeRawText
+		if t == "" {
+			t = p.TypeFqcn
+		}
+		if t == "" {
+			continue
+		}
+		types = append(types, t)
+	}
+	if len(types) == 0 {
+		return name
+	}
+	return name + "(" + strings.Join(types, ",") + ")"
+}
+
 // parseMethodSignature 从方法节点解析签名，保留方法名和参数类型
 // 例如: public String queryJwtToken(String id, String tenantId, String idType) -> queryJwtToken(String, String, String)
 // 例如: forwardLarkEvent(Map<String, Object>) -> forwardLarkEvent(Map<String, Object>)