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feat(examples): update GenerateKeyExample to use ECDSA #2700

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mustafauzunn merged 1 commit into from
Apr 14, 2026
+16 −7
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feat(examples): update GenerateKeyExample to use ECDSA #2700

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23 changes: 16 additions & 7 deletions examples/src/main/java/com/hedera/hashgraph/sdk/examples/GenerateKeyExample.java
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Original file line number Diff line number Diff line change
@@ -1,25 +1,34 @@
// SPDX-License-Identifier: Apache-2.0
package com.hedera.hashgraph.sdk.examples;

import com.hedera.hashgraph.sdk.EvmAddress;
import com.hedera.hashgraph.sdk.PrivateKey;
import com.hedera.hashgraph.sdk.PublicKey;

/**
* How to generate ED25519 key pair.
* How to generate an ECDSA (secp256k1) key pair and derive the EVM address from the public key.
*
* <p>ECDSA keys with an EVM address derived from the public key are the recommended choice for new
* Hedera accounts when you want compatibility with Ethereum tooling (wallets, Hardhat, ethers.js,
* etc.). For legacy Hedera-only flows you can still use {@link PrivateKey#generateED25519()}.
*/
class GenerateKeyExample {

public static void main(String[] args) {
System.out.println("Generate ED25519 Private And Public Key Pair Example Start!");
System.out.println("Generate ECDSA key pair and EVM address example start");

System.out.println("Generating the ED25519 private key...");
PrivateKey privateKey = PrivateKey.generateED25519();
System.out.println("Private Key: " + privateKey);
System.out.println("Generating an ECDSA (secp256k1) private key...");
PrivateKey privateKey = PrivateKey.generateECDSA();
System.out.println("Private key: " + privateKey);

System.out.println("Deriving a public key from the above private key");
System.out.println("Deriving the public key from the private key");
PublicKey publicKey = privateKey.getPublicKey();
System.out.println("Public key: " + publicKey);

System.out.println("Generate ED25519 Private And Public Key Pair Example Complete!");
System.out.println("Deriving the EVM address (last 20 bytes of Keccak-256 of the uncompressed public key)");
EvmAddress evmAddress = publicKey.toEvmAddress();
System.out.println("EVM address: 0x" + evmAddress);

System.out.println("Generate ECDSA key pair and EVM address example complete");
}
}
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