ToStringBuilder

HMCLCore/src/main/java/org/jackhuang/hmcl/game/AssetIndex.java

@@ -18,6 +18,7 @@
 package org.jackhuang.hmcl.game;
 
 import com.google.gson.annotations.SerializedName;
+import org.jackhuang.hmcl.util.ToStringBuilder;
 
 import java.util.Collections;
 import java.util.HashMap;
@@ -52,4 +53,8 @@ public final class AssetIndex {
         return Collections.unmodifiableMap(objects);
     }
 
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this).append("virtual", virtual).append("objects", objects).toString();
+    }
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/game/DownloadInfo.java

@@ -21,6 +21,7 @@ import com.google.gson.JsonParseException;
 import com.google.gson.annotations.SerializedName;
 import org.jackhuang.hmcl.util.Immutable;
 import org.jackhuang.hmcl.util.StringUtils;
+import org.jackhuang.hmcl.util.ToStringBuilder;
 import org.jackhuang.hmcl.util.Validation;
 
 /**
@@ -67,6 +68,11 @@ public class DownloadInfo implements Validation {
         return size;
     }
 
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this).append("url", url).append("sha1", sha1).append("size", size).toString();
+    }
+
     @Override
     public void validate() throws JsonParseException {
         if (StringUtils.isBlank(url))

HMCLCore/src/main/java/org/jackhuang/hmcl/game/ExtractRules.java

@@ -32,7 +32,7 @@ public final class ExtractRules {
     private final List<String> exclude;
 
     public ExtractRules() {
-        this.exclude = Collections.EMPTY_LIST;
+        this.exclude = Collections.emptyList();
     }
 
     public ExtractRules(List<String> exclude) {
@@ -44,7 +44,7 @@ public final class ExtractRules {
     }
 
     public boolean shouldExtract(String path) {
-        return exclude.stream().noneMatch(it -> path.startsWith(it));
+        return exclude.stream().noneMatch(path::startsWith);
     }
 
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/game/Library.java

@@ -22,6 +22,7 @@ import com.google.gson.reflect.TypeToken;
 import org.jackhuang.hmcl.util.Constants;
 import org.jackhuang.hmcl.util.OperatingSystem;
 import org.jackhuang.hmcl.util.Platform;
+import org.jackhuang.hmcl.util.ToStringBuilder;
 
 import java.lang.reflect.Type;
 import java.util.List;
@@ -142,7 +143,7 @@ public class Library implements Comparable<Library> {
 
     @Override
     public String toString() {
-        return "Library[" + getName() + "]";
+        return new ToStringBuilder(this).append("name", getName()).toString();
     }
 
     @Override

HMCLCore/src/main/java/org/jackhuang/hmcl/util/ToStringBuilder.java

@@ -0,0 +1,23 @@
+package org.jackhuang.hmcl.util;
+
+public class ToStringBuilder {
+
+    private final StringBuilder stringBuilder;
+    private boolean first = true;
+
+    public ToStringBuilder(Object object) {
+        stringBuilder = new StringBuilder(object.getClass().getSimpleName()).append(" [");
+    }
+
+    public ToStringBuilder append(String name, Object content) {
+        if (!first)
+            stringBuilder.append(", ");
+        stringBuilder.append(name).append('=').append(content.toString());
+        return this;
+    }
+
+    @Override
+    public String toString() {
+        return stringBuilder.toString() + "]";
+    }
+}