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The Checker Framework enhances Java's type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.dataflow.cfg.node;

import com.sun.source.tree.LiteralTree;
import com.sun.source.tree.Tree;

import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.dataflow.qual.SideEffectFree;

import java.util.Collection;
import java.util.Collections;

/**
 * A node for a double literal. For example:
 *
 * 
 *   -9.
 *   3.14159D
 * 
*/ public class DoubleLiteralNode extends ValueLiteralNode { /** * Create a new DoubleLiteralNode. * * @param t the tree for the literal value */ public DoubleLiteralNode(LiteralTree t) { super(t); assert t.getKind() == Tree.Kind.DOUBLE_LITERAL; } @Override public Double getValue() { return (Double) tree.getValue(); } @Override public R accept(NodeVisitor visitor, P p) { return visitor.visitDoubleLiteral(this, p); } @Override public boolean equals(@Nullable Object obj) { // test that obj is a DoubleLiteralNode if (!(obj instanceof DoubleLiteralNode)) { return false; } // super method compares values return super.equals(obj); } @Override @SideEffectFree public Collection getOperands() { return Collections.emptyList(); } }




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