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points、pointl、pointp、L、P都是数组，分别是点、线、面。它们的关系是：points里包含多个point，L里包含多条pointl，P里包含多个pointp.我想往里面添加点要素。

private void addActionPerformed(java.awt.event.ActionEvent evt) {

// TODO add your handling code here:

add addFrm=new add(null,true);

addFrm.setVisible(true);

int index=0,dianIndex=0;

flag=addFrm.flag;

if(flag==1){

index=addFrm.index;

if(index < 0 || index > points.size() +1){

throw new IndexOutOfBoundsException("顺序表索引越界");

//javax.swing.JOptionPane.showMessageDialog(null, "没有索引号为"+index+"的点");

}else{

points.add(index, aPoint);

points.get(index);

myRepaint();

}

}

else{

index=addFrm.index;

dianIndex=addFrm.dianIndex;

if(flag==2){

if(index < 0 || index > L.size() + 1){

throw new IndexOutOfBoundsException("顺序表索引越界");

// javax.swing.JOptionPane.showMessageDialog(null, "没有索引号为"+index+"的线");

}

else{

Pointl pl=new Pointl();

pl=L.get(index);

L.add(index,pl);

myPoint[] poiArray1=new myPoint[pl.pNumPoints];

poiArray1=pl.pmyPoints;

myPoint[] poiArray2=new myPoint[pl.pNumPoints+1];

if(dianIndex < 0 || dianIndex > pl.pNumPoints + 1){

throw new IndexOutOfBoundsException("顺序表索引越界");

// javax.swing.JOptionPane.showMessageDialog(null, "索引号为"+index+"的线上没有索引号为"+dianIndex+"的点");

}else{

for(int i=0;i

if(i

poiArray2[i]=poiArray1[i];

}

else{

poiArray2[i]=poiArray1[i+1];

}

}

Pointl pl1=new Pointl();

pl1.setPoints(poiArray2);

L.add(index, pl1);

myRepaint();

}

}

}

if(flag==3){

if(index < 0 || index > points.size() + 1){

throw new IndexOutOfBoundsException("顺序表索引越界");

// javax.swing.JOptionPane.showMessageDialog(null, "没有索引号为"+index+"的多边形");

}

else{

Pointp pp=new Pointp();

pp=P.get(index);

if(pp.pNumPoints>3){

if(dianIndex < 0 || dianIndex > pp.pNumPoints+1){

throw new IndexOutOfBoundsException("顺序表索引越界");

// javax.swing.JOptionPane.showMessageDialog(null, "第"+index+"个多边形上没有索引号为"+dianIndex+"的点");

}else{

P.remove(index);

myPoint[] poiArray1=new myPoint[pp.pNumPoints];

poiArray1=pp.pmyPoints;

myPoint[] poiArray2=new myPoint[pp.pNumPoints+1];

for(int i=0;i

if(i

poiArray2[i]=poiArray1[i];

}

else{

poiArray2[i]=poiArray1[i+1];

}

}

Pointp pp1=new Pointp();

pp1.setPoints(poiArray2);

P.add(index, pp1);

}

}

myRepaint();

}

}

}

}