99 lines
2.8 KiB
Plaintext
99 lines
2.8 KiB
Plaintext
_professorj_
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This documentation details available resources, recent additions, and
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constructs which do not currently work in ProfessorJ overall. For
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details of the specific language levels, please see the language level
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specific manuals.
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The interactions window accepts variable declaration, statements and
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expressions legal for the language level. If the text is not sending,
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type Alt+Enter.
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The definitions window expects class and interface definitions,
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interaction boxes, and test-suite boxes. (i.e. what would be given to
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javac plus two graphical boxes). Descriptions of these boxes can be
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found in the DrScheme manual.
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_Libraries available to ProfessorJ:
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*NEW* Items are new to either DrScheme 207 or DrScheme 208
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java.lang.Object
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java.lang.String (see exceptions)
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java.lang.Throwable
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java.lang.*Exception
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*NEW* java.lang.System (only currentTimeMillis, gc, and identityHashCode)
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*NEW* java.lang.Comparable
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*NEW* java.lang.Number
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*NEW* java.lang.Double (see exceptions)
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*NEW* java.lang.Float (see exceptions)
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*NEW* java.lang.Boolean (see exceptions)
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*NEW* java.io.Serializable
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*NEW* java.util.Random
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*NEW* Teachpacks (PLT/collects/htdch)
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*NEW* draw.*
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exceptions:
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String: String(byte[],int,int,String) -- incorrect
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String(byte[],int,int,int) -- incorrect
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getBytes() -- partially incorrect
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replaceAll(String,String) -- not implemented
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replaceFirst(String,String) -- not implemented
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matches(String) -- not implemented
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split(String,int) -- not implemented
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split(String) -- not implemented
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trim -- not implemented
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Double: doubleToLongBits -- not implemented
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doubleToRawBits -- not implemented
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longBitsToDouble -- not implemented
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Float: floatToIntBits, floatToRawBits, longBitsToFloat -- not implemented
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Boolean: getBoolean(String) not implemented
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_General New Items (New to 207 and 208)
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New to all teaching language levels:
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import package.name.*;
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a teachpack directory (PLT/collects/htdch)
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access to draw.* teachpack
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New to Beginner:
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super calls reallowed. For example
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class A {
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int x;
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A(int x) {
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this.x = x;
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}
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int adder() { return x + 1; }
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}
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class B extends A {
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int y;
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B( int x, int y) {
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super(x);
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this.y = y;
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}
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int adder() { return y + super.adder(); }
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}
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now works
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== is restricted to comparing byte, short, int, long, char, and boolean
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values
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Classes may have initialized fields (i.e. int x = 3;)
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_Unfinished constructs:
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nested classes
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switch
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labeled statements (compiles but does not work correctly)
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reflection
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unicode
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synchronized (compiles but is ignored)
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strictfp (compiles but is ignored)
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