import com.sun.tools.classfile.Type.WildcardType; //导入依赖的package包/类
public StringBuilder visitWildcardType(WildcardType type, StringBuilder sb) {
    switch (type.kind) {
        case UNBOUNDED:
            sb.append("?");
            break;
        case EXTENDS:
            sb.append("? extends ");
            append(sb, type.boundType);
            break;
        case SUPER:
            sb.append("? super ");
            append(sb, type.boundType);
            break;
        default:
            throw new AssertionError();
    }
    return sb;
}
 

import com.sun.tools.classfile.Type.WildcardType; //导入依赖的package包/类
@Override
public StringBuilder visitWildcardType(WildcardType type, StringBuilder sb) {
    switch (type.kind) {
        case UNBOUNDED:
            sb.append("?");
            break;
        case EXTENDS:
            sb.append("? extends ");
            append(sb, type.boundType);
            break;
        case SUPER:
            sb.append("? super ");
            append(sb, type.boundType);
            break;
        default:
            throw new AssertionError();
    }
    return sb;
}
 

import com.sun.tools.classfile.Type.WildcardType; //导入依赖的package包/类
public String visitWildcardType(WildcardType type, Void p) {
    switch (type.kind) {
        case UNBOUNDED:
            return "W{?}";
        case EXTENDS:
            return "W{e," + print(type.boundType) + "}";
        case SUPER:
            return "W{s," + print(type.boundType) + "}";
        default:
            throw new AssertionError();
    }
}
 

import com.sun.tools.classfile.Type.WildcardType; //导入依赖的package包/类
public Void visitWildcardType(WildcardType type, Void p) {
    findDependencies(type.boundType);
    return null;
}