GC stress fixes and other bugfixes; classpath progress

classpath/java/lang/Double.java

@@ -1,14 +1,35 @@
 package java.lang;
 
-public final class Double {
+public final class Double extends Number {
   public static final Class TYPE = Class.forCanonicalName("D");
 
   private final double value;
 
+  public Double(String value) {
+    this.value = parseDouble(value);
+  }
+
   public Double(double value) {
     this.value = value;
   }
 
+  public boolean equals(Object o) {
+    return o instanceof Double && ((Double) o).value == value;
+  }
+
+  public int hashCode() {
+    long v = doubleToRawLongBits(value);
+    return (int) ((v >> 32) ^ (v & 0xFF));
+  }
+
+  public String toString() {
+    return toString(value);
+  }
+
+  public static String toString(double v) {
+    return "todo";
+  }
+
   public byte byteValue() {
     return (byte) value;
   }
@@ -32,4 +53,14 @@ public final class Double {
   public double doubleValue() {
     return value;
   }
+
+  public static double parseDouble(String s) {
+    // todo
+    return 0.0;
+  }
+
+  public static long doubleToRawLongBits(double value) {
+    // todo
+    return 0;
+  }
 }