java/lang: add interface classes

classes/java/lang/Appendable.java

@@ -0,0 +1,11 @@
+package java.lang;
+
+import java.io.IOException;
+
+public interface Appendable {
+    Appendable append(char c) throws IOException;
+
+    Appendable append(CharSequence csq) throws IOException;
+
+    Appendable append(CharSequence csq, int start, int end) throws IOException;
+}

classes/java/lang/AutoCloseable.java

@@ -0,0 +1,5 @@
+package java.lang;
+
+public interface AutoCloseable {
+    void close() throws Exception;
+}

classes/java/lang/CharSequence.java

@@ -0,0 +1,11 @@
+package java.lang;
+
+public interface CharSequence {
+    char charAt(int index);
+
+    int length();
+
+    CharSequence subSequence(int start, int end);
+
+    public String toString();
+}

classes/java/lang/Cloneable.java

@@ -0,0 +1,4 @@
+package java.lang;
+
+public interface Cloneable {
+}

classes/java/lang/Comparable.java

@@ -0,0 +1,5 @@
+package java.lang;
+
+public interface Comparable<T> {
+    public int compareTo(T o);
+}

classes/java/lang/Iterable.java

@@ -0,0 +1,5 @@
+package java.lang;
+
+public interface Iterable<T> {
+    Iterator<T> iterator();
+}

classes/java/lang/Runnable.java

@@ -0,0 +1,5 @@
+package java.lang;
+
+public interface Runnable {
+    void run();
+}