public class SignalNoName {

short sigNo;

String sigName;

////

byte sigBoardNo;

byte sigDevNo;

byte sigChannel;

public short getSigNo(){

return sigNo;

}

public StringgetSigName(){

return sigName;

}

public SignalNoName(){}

//public SignalNoName(short sigNo, String sigName){

//this.sigNo = sigNo;

//this.sigName = sigName;

//}

//public void setSignal(short sigNo, String sigName){

//this.sigNo = sigNo;

//this.sigName = sigName;

//}

public void setSignalNo(short sigNo){

this.sigNo = sigNo;

sigBoardNo = (byte)((sigNo>>13)&0x07);

sigDevNo  = (byte)((sigNo>>8)&0x1f);

sigChannel  = (byte)((sigNo>>0)&0xff);

switch(sigNo){

case SigDef.AI2_JT: 

this.sigName = "AI2_JT";

break;

case SigDef.AI3_JT: 

this.sigName = "AI3_JT";

break;

case SigDef.AI1_1V5: 

this.sigName = "AI1_1V5";

break;

case SigDef.AI4_16_P: 

this.sigName = "AI4_16_P";

break;

case SigDef.AI4_16_N: 

this.sigName = "AI4_16_N";

break;

case SigDef.AI5_16_P: 

this.sigName = "AI5_16_P";

break;

case SigDef.AI5_16_N: 

this.sigName = "AI5_16_N";

break;

case SigDef.AI6_20_P: 

this.sigName = "AI6_20_P";

break;

case SigDef.AI6_20_N: 

this.sigName = "AI6_20_N";

break;

case SigDef.AI7_T: 

this.sigName = "AI7_T";

break;

}

}

public boolean sigNoIsMe(String sigName){

return (sigName==this.sigName);

}

public boolean sigNoIsMe(short sigNo){

return (sigNo==this.sigNo);

}

}

public class SigNoNameArray {

//static final 

shortRkTotalSignals   = 22;

public SignalNoNamesigNoArray[] = new SignalNoName[RkTotalSignals]; 

public SigNoNameArray(){

//rk3399

//for(int i=0;i<RkTotalSignals;i++)sigNoArray[i]= new SignalNoName();

//if(sigNoArray[0]!=null)

sigNoArray[0].setSignalNo(SigDef.AI2_JT);//这一行报错

if(sigNoArray[1]!=null)sigNoArray[1].setSignalNo(SigDef.AI3_JT);

if(sigNoArray[2]!=null)sigNoArray[2].setSignalNo(SigDef.AI1_1V5);

if(sigNoArray[3]!=null)sigNoArray[3].setSignalNo(SigDef.AI4_16_P);

if(sigNoArray[4]!=null)sigNoArray[4].setSignalNo(SigDef.AI4_16_N);

if(sigNoArray[5]!=null)sigNoArray[5].setSignalNo(SigDef.AI5_16_P);

if(sigNoArray[6]!=null)sigNoArray[6].setSignalNo(SigDef.AI5_16_N);

if(sigNoArray[7]!=null)sigNoArray[7].setSignalNo(SigDef.AI6_20_P);

if(sigNoArray[8]!=null)sigNoArray[8].setSignalNo(SigDef.AI6_20_N);

if(sigNoArray[9]!=null)sigNoArray[9].setSignalNo(SigDef.AI7_T);

////cj1

}

public static void main(String[] args) {

SigNoNameArray sigNoArr = new SigNoNameArray();

}

}

Exception in thread "main" java.lang.NullPointerException

at SigNoNameArray.<init>(SigNoNameArray.java:10)

at SigNoNameArray.main(SigNoNameArray.java:25)

sigNoArray[0].setSignalNo(SigDef.AI2_JT);//这一行报错