/
block.java
32 lines (27 loc) · 809 Bytes
/
block.java
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import java.util.Date;
public class Block {
public String hash;
public String previousHash;
private String data; //our data will be a simple message.
private long timeStamp; //as number of milliseconds since 1/1/1970.
//Block Constructor.
public Block(String data,String previousHash ) {
this.data = data;
this.previousHash = previousHash;
this.timeStamp = new Date().getTime();
}
}
public String calculateHash() {
String calculatedhash = StringUtil.applySha256(
previousHash +
Long.toString(timeStamp) +
data
);
return calculatedhash;
}
public Block(String data,String previousHash ) {
this.data = data;
this.previousHash = previousHash;
this.timeStamp = new Date().getTime();
this.hash = calculateHash(); //Making sure we do this after we set the other values.
}