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Constructor[]  constructor = Class.forName(“java.lang.String”).getConstructor();
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Constructor  constructor =
Class.forName(“java.lang.String”).getConstructor(StringBuffer.class);
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1.2.4.FieldÀࣺ
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public void setAccessible(boolean flag)
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public void set(Object obj,Object value)
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public Object get(Object obj)
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public class ReflectPoint {
    private int x;
    public int y;
    public ReflectPoint(int x, int y) {
       this.x = x;
       this.y = y;
    }
public int getX() {
       return x;
    }
    public void setX(int x) {
       this.x = x;
    }
    public int getY() {
       return y;
    }
    public void setY(int y) {
       this.y = y;
    }
}
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       ReflectPoint pt1 = new ReflectPoint(3,5);
       Field fieldY = pt1.getClass().getField("y");
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package javatest_danny;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
public class pipeStreamTest {
 public static void main(String[] args) {
  try
  {
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